Connect public, paid and private patent data with Google Patents Public Datasets

Method for measuring temperature using a remote, passive, calibrated rf/rfid tag including a method for calibration

Info

Publication number
WO2003098175A1
WO2003098175A1 PCT/CA2003/000746 CA0300746W WO2003098175A1 WO 2003098175 A1 WO2003098175 A1 WO 2003098175A1 CA 0300746 W CA0300746 W CA 0300746W WO 2003098175 A1 WO2003098175 A1 WO 2003098175A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
temperature
slave
master
rfid
means
Prior art date
Application number
PCT/CA2003/000746
Other languages
French (fr)
Inventor
Michael Petersen
Allan Wilson
Mykola Sherstyuk
Original Assignee
Intelligent Devices Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0716Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
    • G06K19/0717Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor the sensor being capable of sensing environmental conditions such as temperature history or pressure
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00Thermometers giving results other than momentary value of temperature
    • G01K3/02Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
    • G01K3/04Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G06K19/0724Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs the arrangement being a circuit for communicating at a plurality of frequencies, e.g. for managing time multiplexed communication over at least two antennas of different types
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07758Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00Individual entry or exit registers
    • G07C9/00007Access-control involving the use of a pass
    • G07C9/00111Access-control involving the use of a pass the pass performing a presence indicating function, e.g. identification tag or transponder

Abstract

A system for tracking environmental parameters, such as temperature, associated with a package during transportation and storage thereof, comprises a passive RFID (Radio Frequency Identification) tag adapted for containment within the package and at least an RFID reader adapted to communicate with such passive RFID tag. The tag includes means for sensing an environmental parameter, such as temperature, means for storing information respecting such parameter, and means for transmitting such information upon activation by such reader. The reader includes means for activating such tag, means for receiving and storing information received from such tag, and means for making such received information available to an interested party. The system may also include a master tag for external association with the package, the master tag prompting the slave tag to transmit data at specific intervals. If the sensed parameter is temperature the slave tag may utilize a tick oscillator, the transmission frequency of which changes in response to temperature changes, the master tag then determining the temperature on the basis of the frequency change.

Description

METHOD FOR MEASURING TEMPERATURE USING A REMOTE, PASSIVE, CALIBRATED RF/RFID TAG INCLUDING A METHOD FOR

CALIBRATION

The present invention relates to a system that includes a passive, remote radio frequency identification (RFID) tag, and a control device, such as an active smart RFID tag or RFID reader/writer that can communicate with the passive tag giving it energy and receiving data from it and that can analyze and store data so received. In the case of this control device being an active smart RFID tag, the system would further require a reader/writer that can instruct the active RFID tag and can read data created during use of the tags. The system will be utilized primarily in the transport and storage field, or any other field of use where detecting changes in temperature at distance without the use of a direct probe is desirable. The system utilizes a unique means for determining temperature, which means forms part of this patent application. This invention further claims a methodology of calibration to provide accurate temperature measurements (in the range of +/- 0.1 degree C).

BACKGROUND OF THE INVENTION

Devices to measure temperature in transported or stored goods are widely known. Inexpensive temperature sensing devices are generally designed to record only a single excursion outside a preset temperature window. More expensive temperature logging devices are typically bulkier and too costly for single use or disposable applications. A further limitation of prior art is the requirement to retrieve a tag from a shipping box to take a reading or download data from it.

There are many instances where it is desirable to determine and record the temperature at many points during the transportation or storage of a product or load. Electronic sensing and recording devices that can do this are available; they include thermistors or other temperature sensors, a clock, a battery, a memory in which temperature data are recorded, and some form of output mechanism (such as a plug-in port) whereby the recorded data can be read for interpretation by an interested party at a later time. These devices are large in size compared to the disposable tags, and significantly more expensive. They are generally reusable. In some cases, for example where the container's size is small relative to the size of the sensing and recording device or extreme temperatures that would affect battery performance are of interest, they require probes containing a temperature sensor that destroys the integrity of the container. Where the container is large enough to accommodate a sensing and recording device, the device must be removed from the container when it reaches its destination to allow it to be reused.

Passive RFID tags are in wide use for identifying and tracking all manner of packages and items. RFID technology uses electromagnetic or electrostatic coupling in the radio frequency (RF) range of the electromagnetic spectrum to identify uniquely an object of interest. RFID is increasingly supplementing or replacing bar coding for identification purposes and providing electronic packing slip functions in the shipping and logistics industry as it does not require direct contact or line-of-sight scanning.

A passive RFID system comprises an antenna and transceiver (usually combined as a reader) and a transponder (RFID tag). The antenna generates a RF signal that activates the RFID tag. The activated tag then transmits data back to the antenna. The data may be used to notify a logic controller to initiate an action, or stored for subsequent retrieval by an interested party.

In response to the size and cost issues, Petersen and Wilson have described in Canadian Patent Application No. 2,383,049 of April 23, 2002 an active or smart RFID Tag system for monitoring and recording environmental conditions including temperature, that is small in size, relatively inexpensive, and can transmit its data to a reader via wireless means. However it is sufficiently expensive in its manufacture that it could be uneconomical as a single use or disposable device for most applications, necessitating its removal from the container or package at its destination, for the purpose of later re-use. A further limitation is the adverse effect of decreasing temperature on the battery, making the device impractical for very cold applications (such as monitoring dry-ice packaged goods) without the addition of a temperature probe containing a thermistor, which destroys the integrity of the package, or the use of expensive low temperature battery technology.

SUMMARY OF THE INVENTION

The present invention combines a low cost passive RFID tag (slave tag) with an active RFID master tag and an RF writer/reader in a system that senses and records temperature at preprogrammed intervals. The low cost of the slave tag makes it feasible to be used as a disposable temperature sensor.

A further implementation of this invention combines a low cost passive RFID tag (slave tag) with an RF writer/reader in a recording system, omitting the master tag.

The slave tag is inserted in a package or container whose internal temperature is of interest. The master tag polls the slave tag at preprogrammed intervals via RF signal, and the slave tag transmits data (such as its unique ID and/or manufacturer code) back to the master tag by RF signal. The master tag can then determine the temperature of the environment into which the slave tag has been inserted by way of calculating the frequency shift caused by such ambient temperature from its nominal calibrated frequency (see below for method of calibration). DESCRIPTION OF THE PREFERRED EMBODIMENTS

The master RFID tag comprises an integrated circuit with programmable or re-programmable procedure memory, battery, antenna, clock, high-stability oscillator such as piezo-electric, quartz or ceramic resonator, and volatile or non-volatile data memory. The master tag can be pre-programmed at the time of manufacture or can be programmed prior to use using the RF writer/reader. At programmed intervals, the temperature data calculated from the frequency shift during data transmission sessions by the slave tag are stored in the master tag's data memory- The stored temperature data can be downloaded via RF writer/reader by someone interested in the temperature to which the container contents have been exposed.

The slave tag comprises a procedure memory programmed with calibration data (if required, as described below), optional data such as ID, manufacturer codes, electronic packing slip information etc., Manchester-type phase encoder, oscillator whose frequency is temperature sensitive such as a tick oscillator, and a resonator such as an antenna coil, printed antenna, ceramic antenna, etc.

In a further aspect of the system, the temperature sensitive oscillator of the slave tag replaces a thermistor or other direct temperature sensing device as the means of determining the temperature, eliminating the need for a battery in the slave tag. This reduces the cost of manufacturing the slave tag and eliminates the problem of a battery's voltage being temperature sensitive. In principle, any ISO standard RFID tag can be used for this function, adding little or no additional cost to logistic systems already utilizing such RFID tags to track shipments.

In this system, temperature is measured by comparing the stable oscillator frequency of the master tag to the frequency of the slave tag's tick oscillator, a semi-conductor device whose frequency is predictably dependent on temperature. The master tag's antenna is calibrated to receive signals in the frequency range of interest, determined by the range of temperature to which the slave tag might be exposed and the range of frequencies that would result from such temperatures. The temperature at the slave tag would influence the tick count of its oscillator, which would be known to have a predictable change in tick frequency in response to changes in temperature.

Penc = Tf (temp)

Where Penc = period of Manchester encoder pulses; Tf = sigmoid type function; temp = temperature

The relationship between temperature and frequency would be calibrated prior to use and stored in the procedure memory of the master tag. It could also be stored in the slave tag's procedure memory, instead of or part of its ID. Deviation of the returning RF signal's frequency from that of the stable oscillator in the master tag would be determined and compared to the frequency-temperature calibration data for the slave tag's oscillator. The resulting calculated temperature at the slave tag would then be recorded in the master tag's temperature data memory. As indicated above, the data could be stored in the slave tag's memory, perhaps after having been calculated and recorded at the master tag. At a later time, a party interested in the temperature to which the container was exposed could download the stored temperature data from the master tag using a RF or other type of reader.

In use, the slave tag is placed inside a container at the time of shipping or at the time of manufacture of such container. The master tag is placed outside the container in close proximity, such as attached to the container by adhesive or other means. The master tag is programmed to cause the slave tag to transmit data to it at intervals of interest to the user.

The master tag polls the slave tag by transmitting an RF signal that excites the slave tag's tick oscillator and provides energy to the device. The Slave tag responds by transmitting an RF signal that can be detected by the master tag. Because of the sensitivity of the slave tag's tick oscillator to changes in temperature, its signal will deviate from the master tag's RF frequency according to a predictable relationship.

Calibration data for the slave tag's temperature-frequency relationship will be stored either in the slave tag's or master tag's memory, and the difference in frequency from the transmitted RF signal to the received RF signal will be applied to the calibration data to determine the temperature at the slave tag. This will be time stamped and recorded in the master tag's data memory, or possibly in the slave tag's memory.

To calibrate the slave tag's temperature-frequency relationship

Penc = Tf (temp)

Penc is determined under two or more specific temperatures temp....... tempn. To achieve this, the slave tag could be inserted into a temperature insulated chamber containing a thermoelectric element (effet Peltier). The temperature could be changed rapidly and with precision, allowing Penct

Penc„ to be determined. The specific function can then be calculated for this tag sample and stored in the procedure memory of the slave tag from which it would be downloaded to the master tag or writer/reader to be used in temperature determination. This would obviate the necessity of uniquely pairing slave and master tags. The temperature-frequency function might equally be stored in the procedure memory of the master tag if specific master-slave pairs are to be used. From this function the temperature can be computed for any value of Penc.

To provide very exact temperature measurements (+/- 0.1 degree C), each tag would be calibrated. However, in large scale implementation calibration could be generalized to the design and components of a particular type of slave tag (such as a standard RFID tag produced by a particular manufacturer) and therefore avoid the requirement for individual calibration of each tag. In such cases, a generic calibration coefficient would be sufficient to provide temperature measurements in the +/- 1 degree C range, if not better.

As described by Petersen and Wilson in Canadian Application No. 2,383,049, the temperature data can be retrieved from the master tag or from the slave tag, if stored there, by an interested party. The master tag can be single use or multiple use and may be reprogrammable. Petersen and Wilson describe various means by which this might be done. The slave tag can also be single use or reusable

In a variation of the invention, the master tag is omitted from the system and the passive RFID slave tag is inserted into a package or container. Each time the package passes through a RF reader at a loading station, unloading station, sorting station, warehouse or delivery point, as is currently in widespread use for tracking the movement of such packages, the temperature at the RFID tag at that time could also be determined and processed (stored, downloaded) by the reader. This would allow a central database to keep track of the time and internal temperature of the package at each waypoint in systems where such packages are already being scanned and tracked using barcodes and/or RFID tags.

In a further variation of the invention, the package ID, electronic packing slip, other logistics related information, manufacturer code (to facilitate "generic" calibration - see above) and temperature sensitive components could be combined in a single passive RFID tag, thereby eliminating the requirement for additional hardware to provide the benefit of temperature measurements, by utilizing RFID readers and passive RFID tags already incorporated into the logistics infrastructure of shipping and courier companies.

Claims

CLAIMS:
1. A system for tracking environmental parameters associated with a package during transportation and storage thereof, comprising a passive RFID (Radio Frequency Identification) tag adapted for containment within the package and an RFID reader adapted to communicate with such passive RFID tag, such tag including means for sensing an environmental parameter, means for storing information respecting such parameter, and means for transmitting such information upon activation by such reader, such reader including means for activating such tag, means for receiving and storing information received from such tag, and means for making such received information available to an interested party.
2. A system for tracking temperature differentials associated with a package during transportation and storage thereof, comprising a passive RFID (Radio Frequency Identification) tag adapted for containment within the package and an RFID reader adapted to communicate with such passive RFID tag, such tag including means for sensing temperature, means for storing temperature data and means for transmitting such data upon activation by such reader, such reader including means for activating such tag, means for receiving and storing temperature data received from such tag, and means for making such received temperature data available to an interested party.
3. A system for tracking temperature differentials associated with a package during transportation and storage thereof, comprising a slave RFID (Radio Frequency Identification) tag adapted for containment within the package, a master RFID tag adapted for external association with such package, and an RFID reader adapted to communicate with such master RFID tag, such slave RFID tag including temperature sensitive oscillator means and antenna means, such master RFID tag including power means, antenna means, timing means and memory means, and such RFID reader including transceiver means for communicating with such master tag, means for storing temperature data received from such master tag, and means for making such received temperature data available to an interested party.
4. The system of claim 3 wherein said oscillator means in such slave tag is a tick oscillator whose frequency will shift predictably in accordance with changes in temperature, a change in frequency from a stable known frequency associated with a known temperature being indicative of a temperature change from said known temperature.
5. The system of claim 4 wherein such slave tag includes procedure memory means programmed with calibration and identification data.
6. The system of claim 4 wherein said master tag includes integrated circuit means, procedure memory, high-stability oscillator means and data memory, said timing means of said master tag causing said master tag to activate said slave tag at predetermined intervals, to receive a signal from said tick oscillator, to analyse the frequency associated with such signal, and to determine a temperature based on the frequency change from said stable frequency.
7. The system of claim 6 wherein each slave tag is paired with a specific master tag, with such tags having been calibrated together.
8. The system of claim 6 wherein a plurality of slave tags are calibrated together with a plurality of master tags whereby any such master tag of such plurality of master tags will be operable with any such slave tag of such plurality of slave tags.
9. The system of any one of claims 3 to 8 wherein such RFID reader is also capable of writing programming instructions to a master RFID tag whereby such master tag can be used in different situations.
10. The system of any one of claims 3 to 9 wherein the slave tag is disposable after one or more uses.
11. A method of calibrating slave tags for use in a system according to claim 5 or claim 6 comprising the steps of: inserting a slave tag into a temperature insulated chamber containing a thermoelectric element, rapidly and precisely altering the temperature within said chamber, calculating a specific temperature-frequency relationship for said tag in accordance with the expression:
Penc = Tfζtemp) where Penc = period of Manchester encoder pulses; Tf = sigmoid type function; temp = temperature and storing the specific function determined for such slave tag in the procedure memory of such tag.
12. The method of claim 11 wherein each slave tag is paired with a specific master tag and the specific temperature-frequency function of the slave tag is stored in the procedure memory of the master tag with which it is paired.
PCT/CA2003/000746 2002-05-21 2003-05-21 Method for measuring temperature using a remote, passive, calibrated rf/rfid tag including a method for calibration WO2003098175A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2,387,106 2002-05-21
CA 2387106 CA2387106A1 (en) 2002-05-21 2002-05-21 Method for measuring temperature using a remote, passive, calibrated rf/rfid tag including a method for calibration

Publications (1)

Publication Number Publication Date
WO2003098175A1 true true WO2003098175A1 (en) 2003-11-27

Family

ID=29425959

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2003/000746 WO2003098175A1 (en) 2002-05-21 2003-05-21 Method for measuring temperature using a remote, passive, calibrated rf/rfid tag including a method for calibration

Country Status (2)

Country Link
CA (1) CA2387106A1 (en)
WO (1) WO2003098175A1 (en)

Cited By (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6973371B1 (en) 2004-10-13 2005-12-06 Nadir Benouali Unit dose compliance monitoring and reporting device and system
US7301439B2 (en) 2004-07-07 2007-11-27 Fujitsu Limited Radio IC tag reader writer, radio IC tag system, and radio IC tag data writing method
US7327260B2 (en) 2005-05-19 2008-02-05 International Business Machines Corporation System and method to record environmental condition on an RFID tag
US7382263B2 (en) 2005-05-20 2008-06-03 Dow Global Technologies Inc. Oral drug compliance monitoring using radio frequency identification tags
US7492254B2 (en) 2003-10-24 2009-02-17 Symbol Technologies, Inc. Radio frequency identification (RFID) based sensor networks
US7636031B2 (en) 2006-05-01 2009-12-22 Honeywell International Inc. Sensor system including multiple radio frequency identification tags
US7667574B2 (en) 2006-12-14 2010-02-23 Corning Cable Systems, Llc Signal-processing systems and methods for RFID-tag signals
WO2009131381A3 (en) * 2008-04-22 2010-05-20 Electronics And Telecommunications Research Institute Rfid reader, rfid tag, and controlling method thereof
US7733944B2 (en) 2005-06-16 2010-06-08 Terahop Networks, Inc. Operating GPS receivers in GPS-adverse environment
US7760094B1 (en) 2006-12-14 2010-07-20 Corning Cable Systems Llc RFID systems and methods for optical fiber network deployment and maintenance
US7783246B2 (en) 2005-06-16 2010-08-24 Terahop Networks, Inc. Tactical GPS denial and denial detection system
US7787823B2 (en) 2006-09-15 2010-08-31 Corning Cable Systems Llc Radio-over-fiber (RoF) optical fiber cable system with transponder diversity and RoF wireless picocellular system using same
US7848654B2 (en) 2006-09-28 2010-12-07 Corning Cable Systems Llc Radio-over-fiber (RoF) wireless picocellular system with combined picocells
US7855697B2 (en) 2007-08-13 2010-12-21 Corning Cable Systems, Llc Antenna systems for passive RFID tags
US7911345B2 (en) 2008-05-12 2011-03-22 General Electric Company Methods and systems for calibration of RFID sensors
WO2011055014A1 (en) * 2009-11-05 2011-05-12 Valtion Teknillinen Tutkimuskeskus Method for temperature measurement
US8045929B2 (en) 2006-01-01 2011-10-25 Terahop Networks, Inc. Determining presence of radio frequency communication device
WO2012052607A1 (en) * 2010-10-22 2012-04-26 Upm Rfid Oy Methods for enhancing the accuracy of environment measurements using a remote-access apparatus
US8172468B2 (en) 2010-05-06 2012-05-08 Corning Incorporated Radio frequency identification (RFID) in communication connections, including fiber optic components
US8175459B2 (en) 2007-10-12 2012-05-08 Corning Cable Systems Llc Hybrid wireless/wired RoF transponder and hybrid RoF communication system using same
US8207848B2 (en) 2008-05-16 2012-06-26 Google Inc. Locking system for shipping container including bolt seal and electronic device with arms for receiving bolt seal
US8248208B2 (en) 2008-07-15 2012-08-21 Corning Cable Systems, Llc. RFID-based active labeling system for telecommunication systems
US8264355B2 (en) 2006-12-14 2012-09-11 Corning Cable Systems Llc RFID systems and methods for optical fiber network deployment and maintenance
US8264366B2 (en) 2009-03-31 2012-09-11 Corning Incorporated Components, systems, and methods for associating sensor data with component location
US8275265B2 (en) 2010-02-15 2012-09-25 Corning Cable Systems Llc Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods
US20120245884A1 (en) * 2009-12-08 2012-09-27 Endress + Wetzer GmbH _ Co. KG Measuring arrangement for determining amount of heat
US8548330B2 (en) 2009-07-31 2013-10-01 Corning Cable Systems Llc Sectorization in distributed antenna systems, and related components and methods
US8644844B2 (en) 2007-12-20 2014-02-04 Corning Mobileaccess Ltd. Extending outdoor location based services and applications into enclosed areas
US8731405B2 (en) 2008-08-28 2014-05-20 Corning Cable Systems Llc RFID-based systems and methods for collecting telecommunications network information
US8867919B2 (en) 2007-07-24 2014-10-21 Corning Cable Systems Llc Multi-port accumulator for radio-over-fiber (RoF) wireless picocellular systems
US8873585B2 (en) 2006-12-19 2014-10-28 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US9037143B2 (en) 2010-08-16 2015-05-19 Corning Optical Communications LLC Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
US9042732B2 (en) 2010-05-02 2015-05-26 Corning Optical Communications LLC Providing digital data services in optical fiber-based distributed radio frequency (RF) communication systems, and related components and methods
US9112611B2 (en) 2009-02-03 2015-08-18 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9142107B2 (en) 2009-07-14 2015-09-22 Deal Magic Inc. Wireless tracking and monitoring electronic seal
US9159012B2 (en) 2009-11-30 2015-10-13 Corning Incorporated RFID condition latching
US9165232B2 (en) 2012-05-14 2015-10-20 Corning Incorporated Radio-frequency identification (RFID) tag-to-tag autoconnect discovery, and related methods, circuits, and systems
US9177282B2 (en) 2009-08-17 2015-11-03 Deal Magic Inc. Contextually aware monitoring of assets
US9178635B2 (en) 2014-01-03 2015-11-03 Corning Optical Communications Wireless Ltd Separation of communication signal sub-bands in distributed antenna systems (DASs) to reduce interference
US9184843B2 (en) 2011-04-29 2015-11-10 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9219879B2 (en) 2009-11-13 2015-12-22 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9240835B2 (en) 2011-04-29 2016-01-19 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
US9247543B2 (en) 2013-07-23 2016-01-26 Corning Optical Communications Wireless Ltd Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US9258052B2 (en) 2012-03-30 2016-02-09 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9295099B2 (en) 2007-02-21 2016-03-22 Google Inc. Wake-up broadcast including network information in common designation ad hoc wireless networking
US9325429B2 (en) 2011-02-21 2016-04-26 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US9357551B2 (en) 2014-05-30 2016-05-31 Corning Optical Communications Wireless Ltd Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCS), including in distributed antenna systems
US9385810B2 (en) 2013-09-30 2016-07-05 Corning Optical Communications Wireless Ltd Connection mapping in distributed communication systems
US9420542B2 (en) 2014-09-25 2016-08-16 Corning Optical Communications Wireless Ltd System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units
US9455784B2 (en) 2012-10-31 2016-09-27 Corning Optical Communications Wireless Ltd Deployable wireless infrastructures and methods of deploying wireless infrastructures
US9525488B2 (en) 2010-05-02 2016-12-20 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
US9525472B2 (en) 2014-07-30 2016-12-20 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9531452B2 (en) 2012-11-29 2016-12-27 Corning Optical Communications LLC Hybrid intra-cell / inter-cell remote unit antenna bonding in multiple-input, multiple-output (MIMO) distributed antenna systems (DASs)
US9532310B2 (en) 2008-12-25 2016-12-27 Google Inc. Receiver state estimation in a duty cycled radio
US9563832B2 (en) 2012-10-08 2017-02-07 Corning Incorporated Excess radio-frequency (RF) power storage and power sharing RF identification (RFID) tags, and related connection systems and methods
US9602210B2 (en) 2014-09-24 2017-03-21 Corning Optical Communications Wireless Ltd Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS)
US9621293B2 (en) 2012-08-07 2017-04-11 Corning Optical Communications Wireless Ltd Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods
US9647758B2 (en) 2012-11-30 2017-05-09 Corning Optical Communications Wireless Ltd Cabling connectivity monitoring and verification
US9652708B2 (en) 2006-10-31 2017-05-16 Fiber Mountain, Inc. Protocol for communications between a radio frequency identification (RFID) tag and a connected device, and related systems and methods
US9652707B2 (en) 2006-10-31 2017-05-16 Fiber Mountain, Inc. Radio frequency identification (RFID) connected tag communications protocol and related systems and methods
US9652709B2 (en) 2006-10-31 2017-05-16 Fiber Mountain, Inc. Communications between multiple radio frequency identification (RFID) connected tags and one or more devices, and related systems and methods
US9661781B2 (en) 2013-07-31 2017-05-23 Corning Optical Communications Wireless Ltd Remote units for distributed communication systems and related installation methods and apparatuses
US9673904B2 (en) 2009-02-03 2017-06-06 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9681313B2 (en) 2015-04-15 2017-06-13 Corning Optical Communications Wireless Ltd Optimizing remote antenna unit performance using an alternative data channel
US9715157B2 (en) 2013-06-12 2017-07-25 Corning Optical Communications Wireless Ltd Voltage controlled optical directional coupler
US9730228B2 (en) 2014-08-29 2017-08-08 Corning Optical Communications Wireless Ltd Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit
US9729267B2 (en) 2014-12-11 2017-08-08 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US9775123B2 (en) 2014-03-28 2017-09-26 Corning Optical Communications Wireless Ltd. Individualized gain control of uplink paths in remote units in a distributed antenna system (DAS) based on individual remote unit contribution to combined uplink power
US9807700B2 (en) 2015-02-19 2017-10-31 Corning Optical Communications Wireless Ltd Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS)
US9860839B2 (en) 2004-05-27 2018-01-02 Google Llc Wireless transceiver
US9892359B2 (en) 2015-11-03 2018-02-13 3M Innovative Properties Company Wireless sensor for thermal property with thermal source

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7109859B2 (en) 2002-12-23 2006-09-19 Gentag, Inc. Method and apparatus for wide area surveillance of a terrorist or personal threat
EP2843848B1 (en) 2004-01-27 2017-11-01 Altivera L.L.C. Diagnostic radio frequency identification sensors and applications thereof
CA2472809A1 (en) * 2004-06-30 2005-12-30 Intelligent Devices Inc. Rfid sensor tag with on-board processing
DE102008056930A1 (en) 2007-11-19 2009-12-31 Brühn, Alfred Wireless radio identification

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563713A2 (en) * 1992-04-01 1993-10-06 Hughes Aircraft Company Remote identification sensor system
GB2308947A (en) * 1996-01-04 1997-07-09 I D Systems Ltd Identification tag with environmental sensing facility
WO2001035064A1 (en) * 1999-11-05 2001-05-17 Durametrics, Inc. Ultrasonic thermometer system
US6359444B1 (en) * 1999-05-28 2002-03-19 University Of Kentucky Research Foundation Remote resonant-circuit analyte sensing apparatus with sensing structure and associated method of sensing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563713A2 (en) * 1992-04-01 1993-10-06 Hughes Aircraft Company Remote identification sensor system
GB2308947A (en) * 1996-01-04 1997-07-09 I D Systems Ltd Identification tag with environmental sensing facility
US6359444B1 (en) * 1999-05-28 2002-03-19 University Of Kentucky Research Foundation Remote resonant-circuit analyte sensing apparatus with sensing structure and associated method of sensing
WO2001035064A1 (en) * 1999-11-05 2001-05-17 Durametrics, Inc. Ultrasonic thermometer system

Cited By (103)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7492254B2 (en) 2003-10-24 2009-02-17 Symbol Technologies, Inc. Radio frequency identification (RFID) based sensor networks
US9860839B2 (en) 2004-05-27 2018-01-02 Google Llc Wireless transceiver
US9872249B2 (en) 2004-05-27 2018-01-16 Google Llc Relaying communications in a wireless sensor system
US7301439B2 (en) 2004-07-07 2007-11-27 Fujitsu Limited Radio IC tag reader writer, radio IC tag system, and radio IC tag data writing method
US6973371B1 (en) 2004-10-13 2005-12-06 Nadir Benouali Unit dose compliance monitoring and reporting device and system
US7489246B2 (en) 2005-05-19 2009-02-10 International Business Machines Corporation System and method to record environmental condition on an RFID tag
US7327260B2 (en) 2005-05-19 2008-02-05 International Business Machines Corporation System and method to record environmental condition on an RFID tag
US7382263B2 (en) 2005-05-20 2008-06-03 Dow Global Technologies Inc. Oral drug compliance monitoring using radio frequency identification tags
US7783246B2 (en) 2005-06-16 2010-08-24 Terahop Networks, Inc. Tactical GPS denial and denial detection system
US7733944B2 (en) 2005-06-16 2010-06-08 Terahop Networks, Inc. Operating GPS receivers in GPS-adverse environment
US8045929B2 (en) 2006-01-01 2011-10-25 Terahop Networks, Inc. Determining presence of radio frequency communication device
US8050668B2 (en) 2006-01-01 2011-11-01 Terahop Networks, Inc. Determining presence of radio frequency communication device
US7636031B2 (en) 2006-05-01 2009-12-22 Honeywell International Inc. Sensor system including multiple radio frequency identification tags
US7787823B2 (en) 2006-09-15 2010-08-31 Corning Cable Systems Llc Radio-over-fiber (RoF) optical fiber cable system with transponder diversity and RoF wireless picocellular system using same
US7848654B2 (en) 2006-09-28 2010-12-07 Corning Cable Systems Llc Radio-over-fiber (RoF) wireless picocellular system with combined picocells
US9652707B2 (en) 2006-10-31 2017-05-16 Fiber Mountain, Inc. Radio frequency identification (RFID) connected tag communications protocol and related systems and methods
US9652708B2 (en) 2006-10-31 2017-05-16 Fiber Mountain, Inc. Protocol for communications between a radio frequency identification (RFID) tag and a connected device, and related systems and methods
US9652709B2 (en) 2006-10-31 2017-05-16 Fiber Mountain, Inc. Communications between multiple radio frequency identification (RFID) connected tags and one or more devices, and related systems and methods
US8264355B2 (en) 2006-12-14 2012-09-11 Corning Cable Systems Llc RFID systems and methods for optical fiber network deployment and maintenance
US7667574B2 (en) 2006-12-14 2010-02-23 Corning Cable Systems, Llc Signal-processing systems and methods for RFID-tag signals
US7760094B1 (en) 2006-12-14 2010-07-20 Corning Cable Systems Llc RFID systems and methods for optical fiber network deployment and maintenance
US9130613B2 (en) 2006-12-19 2015-09-08 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US8873585B2 (en) 2006-12-19 2014-10-28 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US9295099B2 (en) 2007-02-21 2016-03-22 Google Inc. Wake-up broadcast including network information in common designation ad hoc wireless networking
US8867919B2 (en) 2007-07-24 2014-10-21 Corning Cable Systems Llc Multi-port accumulator for radio-over-fiber (RoF) wireless picocellular systems
US7855697B2 (en) 2007-08-13 2010-12-21 Corning Cable Systems, Llc Antenna systems for passive RFID tags
US8718478B2 (en) 2007-10-12 2014-05-06 Corning Cable Systems Llc Hybrid wireless/wired RoF transponder and hybrid RoF communication system using same
US8175459B2 (en) 2007-10-12 2012-05-08 Corning Cable Systems Llc Hybrid wireless/wired RoF transponder and hybrid RoF communication system using same
US8644844B2 (en) 2007-12-20 2014-02-04 Corning Mobileaccess Ltd. Extending outdoor location based services and applications into enclosed areas
WO2009131381A3 (en) * 2008-04-22 2010-05-20 Electronics And Telecommunications Research Institute Rfid reader, rfid tag, and controlling method thereof
US7911345B2 (en) 2008-05-12 2011-03-22 General Electric Company Methods and systems for calibration of RFID sensors
US8207848B2 (en) 2008-05-16 2012-06-26 Google Inc. Locking system for shipping container including bolt seal and electronic device with arms for receiving bolt seal
US8248208B2 (en) 2008-07-15 2012-08-21 Corning Cable Systems, Llc. RFID-based active labeling system for telecommunication systems
US8731405B2 (en) 2008-08-28 2014-05-20 Corning Cable Systems Llc RFID-based systems and methods for collecting telecommunications network information
US9058529B2 (en) 2008-08-28 2015-06-16 Corning Optical Communications LLC RFID-based systems and methods for collecting telecommunications network information
US9699736B2 (en) 2008-12-25 2017-07-04 Google Inc. Reducing a number of wake-up frames in a sequence of wake-up frames
US9532310B2 (en) 2008-12-25 2016-12-27 Google Inc. Receiver state estimation in a duty cycled radio
US9112611B2 (en) 2009-02-03 2015-08-18 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9673904B2 (en) 2009-02-03 2017-06-06 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US8264366B2 (en) 2009-03-31 2012-09-11 Corning Incorporated Components, systems, and methods for associating sensor data with component location
US9142107B2 (en) 2009-07-14 2015-09-22 Deal Magic Inc. Wireless tracking and monitoring electronic seal
US8548330B2 (en) 2009-07-31 2013-10-01 Corning Cable Systems Llc Sectorization in distributed antenna systems, and related components and methods
US9177282B2 (en) 2009-08-17 2015-11-03 Deal Magic Inc. Contextually aware monitoring of assets
CN102762967A (en) * 2009-11-05 2012-10-31 Vtt科技研究中心 Method for temperature measurement
US9212954B2 (en) 2009-11-05 2015-12-15 Teknologian Tutkimuskeskus Vtt Method for temperature measurement
WO2011055014A1 (en) * 2009-11-05 2011-05-12 Valtion Teknillinen Tutkimuskeskus Method for temperature measurement
US9219879B2 (en) 2009-11-13 2015-12-22 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9485022B2 (en) 2009-11-13 2016-11-01 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9729238B2 (en) 2009-11-13 2017-08-08 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9159012B2 (en) 2009-11-30 2015-10-13 Corning Incorporated RFID condition latching
US20120245884A1 (en) * 2009-12-08 2012-09-27 Endress + Wetzer GmbH _ Co. KG Measuring arrangement for determining amount of heat
US9316548B2 (en) * 2009-12-08 2016-04-19 Endress + Hauser Wetzer Gmbh + Co. Kg Measuring arrangement for determining amount of heat
US8831428B2 (en) 2010-02-15 2014-09-09 Corning Optical Communications LLC Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods
US9319138B2 (en) 2010-02-15 2016-04-19 Corning Optical Communications LLC Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods
US8275265B2 (en) 2010-02-15 2012-09-25 Corning Cable Systems Llc Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods
US9042732B2 (en) 2010-05-02 2015-05-26 Corning Optical Communications LLC Providing digital data services in optical fiber-based distributed radio frequency (RF) communication systems, and related components and methods
US9853732B2 (en) 2010-05-02 2017-12-26 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
US9270374B2 (en) 2010-05-02 2016-02-23 Corning Optical Communications LLC Providing digital data services in optical fiber-based distributed radio frequency (RF) communications systems, and related components and methods
US9525488B2 (en) 2010-05-02 2016-12-20 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
US8172468B2 (en) 2010-05-06 2012-05-08 Corning Incorporated Radio frequency identification (RFID) in communication connections, including fiber optic components
US8333518B2 (en) 2010-05-06 2012-12-18 Corning Incorporated Radio frequency identification (RFID) in communication connections, including fiber optic components
US9037143B2 (en) 2010-08-16 2015-05-19 Corning Optical Communications LLC Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
US9202093B2 (en) 2010-10-22 2015-12-01 Smartrac Ip B.V. Methods for enhancing the accuracy of environment measurements using a remote-access apparatus
WO2012052604A1 (en) 2010-10-22 2012-04-26 Upm Rfid Oy Temperature managed chain
WO2012052607A1 (en) * 2010-10-22 2012-04-26 Upm Rfid Oy Methods for enhancing the accuracy of environment measurements using a remote-access apparatus
EP2630457A4 (en) * 2010-10-22 2017-05-31 Smartrac Ip Bv Temperature managed chain
EP2630733A1 (en) * 2010-10-22 2013-08-28 Smartrac IP B.V. Methods for enhancing the accuracy of environment measurements using a remote-access apparatus
WO2012052603A1 (en) * 2010-10-22 2012-04-26 Upm Rfid Oy A method for measuring environment using a calibration database
EP2630733A4 (en) * 2010-10-22 2017-05-10 Smartrac Ip Bv Methods for enhancing the accuracy of environment measurements using a remote-access apparatus
US8913892B2 (en) 2010-10-28 2014-12-16 Coring Optical Communications LLC Sectorization in distributed antenna systems, and related components and methods
US9325429B2 (en) 2011-02-21 2016-04-26 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US9813164B2 (en) 2011-02-21 2017-11-07 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US9807722B2 (en) 2011-04-29 2017-10-31 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9369222B2 (en) 2011-04-29 2016-06-14 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9240835B2 (en) 2011-04-29 2016-01-19 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
US9806797B2 (en) 2011-04-29 2017-10-31 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
US9184843B2 (en) 2011-04-29 2015-11-10 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9258052B2 (en) 2012-03-30 2016-02-09 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9813127B2 (en) 2012-03-30 2017-11-07 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9165232B2 (en) 2012-05-14 2015-10-20 Corning Incorporated Radio-frequency identification (RFID) tag-to-tag autoconnect discovery, and related methods, circuits, and systems
US9621293B2 (en) 2012-08-07 2017-04-11 Corning Optical Communications Wireless Ltd Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods
US9563832B2 (en) 2012-10-08 2017-02-07 Corning Incorporated Excess radio-frequency (RF) power storage and power sharing RF identification (RFID) tags, and related connection systems and methods
US9455784B2 (en) 2012-10-31 2016-09-27 Corning Optical Communications Wireless Ltd Deployable wireless infrastructures and methods of deploying wireless infrastructures
US9531452B2 (en) 2012-11-29 2016-12-27 Corning Optical Communications LLC Hybrid intra-cell / inter-cell remote unit antenna bonding in multiple-input, multiple-output (MIMO) distributed antenna systems (DASs)
US9647758B2 (en) 2012-11-30 2017-05-09 Corning Optical Communications Wireless Ltd Cabling connectivity monitoring and verification
US9715157B2 (en) 2013-06-12 2017-07-25 Corning Optical Communications Wireless Ltd Voltage controlled optical directional coupler
US9526020B2 (en) 2013-07-23 2016-12-20 Corning Optical Communications Wireless Ltd Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US9247543B2 (en) 2013-07-23 2016-01-26 Corning Optical Communications Wireless Ltd Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US9661781B2 (en) 2013-07-31 2017-05-23 Corning Optical Communications Wireless Ltd Remote units for distributed communication systems and related installation methods and apparatuses
US9385810B2 (en) 2013-09-30 2016-07-05 Corning Optical Communications Wireless Ltd Connection mapping in distributed communication systems
US9178635B2 (en) 2014-01-03 2015-11-03 Corning Optical Communications Wireless Ltd Separation of communication signal sub-bands in distributed antenna systems (DASs) to reduce interference
US9775123B2 (en) 2014-03-28 2017-09-26 Corning Optical Communications Wireless Ltd. Individualized gain control of uplink paths in remote units in a distributed antenna system (DAS) based on individual remote unit contribution to combined uplink power
US9807772B2 (en) 2014-05-30 2017-10-31 Corning Optical Communications Wireless Ltd. Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCs), including in distributed antenna systems
US9357551B2 (en) 2014-05-30 2016-05-31 Corning Optical Communications Wireless Ltd Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCS), including in distributed antenna systems
US9525472B2 (en) 2014-07-30 2016-12-20 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9730228B2 (en) 2014-08-29 2017-08-08 Corning Optical Communications Wireless Ltd Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit
US9602210B2 (en) 2014-09-24 2017-03-21 Corning Optical Communications Wireless Ltd Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS)
US9420542B2 (en) 2014-09-25 2016-08-16 Corning Optical Communications Wireless Ltd System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units
US9788279B2 (en) 2014-09-25 2017-10-10 Corning Optical Communications Wireless Ltd System-wide uplink band gain control in a distributed antenna system (DAS), based on per-band gain control of remote uplink paths in remote units
US9729267B2 (en) 2014-12-11 2017-08-08 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US9807700B2 (en) 2015-02-19 2017-10-31 Corning Optical Communications Wireless Ltd Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS)
US9681313B2 (en) 2015-04-15 2017-06-13 Corning Optical Communications Wireless Ltd Optimizing remote antenna unit performance using an alternative data channel
US9892359B2 (en) 2015-11-03 2018-02-13 3M Innovative Properties Company Wireless sensor for thermal property with thermal source

Also Published As

Publication number Publication date Type
CA2387106A1 (en) 2003-11-21 application

Similar Documents

Publication Publication Date Title
US7049963B2 (en) Networked RF tag for tracking freight
US20050110636A1 (en) Real time total asset visibility system
US6294997B1 (en) RFID tag having timing and environment modules
US20070273507A1 (en) Apparatus and method for monitoring and communicating data associated with a product
Opasjumruskit et al. Self-powered wireless temperature sensors exploit RFID technology
US7015826B1 (en) Method and apparatus for sensing and transmitting a body characteristic of a host
US20090160646A1 (en) System and method for monitoring and tracking inventories
US20030146836A1 (en) Monitoring method
US7489244B2 (en) Networked RF tag for tracking baggage
US7002451B2 (en) Package location system
US20050104790A1 (en) RFID tag with tunable antenna and associated reader
US20060208881A1 (en) Transportation device and method of living tissues
US6483434B1 (en) Container tracking system
US20070296581A1 (en) Removable data storage media tracking system
US20080272131A1 (en) Insulated Container Having a Temperature Monitoring Device
US6865516B1 (en) Method of recording the temperature of perishable products in cold chain distribution
US20070057771A1 (en) RFID transponder and RFID transponder chip
US20010049629A1 (en) Package location system
US6185513B1 (en) Data recorder
US20040046643A1 (en) Method and device for storing and distributing information in an RFID tag
US20040061655A1 (en) Environmentally sensitive multi-frequency antenna
US20100156606A1 (en) RFID Sensor Assemblies and Methods of Use
US6617963B1 (en) Event-recording devices with identification codes
US20070236338A1 (en) RFID tag and method for obtaining information on article using the same
US6806808B1 (en) Wireless event-recording device with identification codes

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP