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公开(公告)号：JPH10209913A
公开(公告)日：1998-08-07
申请号：JP1002898
申请日：1998-01-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MACLELLAN JOHN AUSTIN , VANNUCCI GIOVANNI
Abstract: PROBLEM TO BE SOLVED: To improve the secrecy of the RFID data by preparing the question units which convert the 1st information signals into the radio carrier signals, transmitting these carrier signals to the remote tags from the question units, and making each remote tag receive a 1st modulation signal and obtain a 2nd modulation signal after applying the back scatter modulation to the reflection of the 1st modulation signal. SOLUTION: An application processor 101 communicates with the question units 103 and 104 via a LAN 102, and the units 103 and 104 communicate with one or plural ones of tags 105 to 107. The unit 103 receives and fetches the information signal from the processor 101. A processor 200 produces the down link messages that can be suitably sent to the tags. Thus, the secret information can be exchanged between the tags and the question units by means of an MBS(modulation back scatter) technique.
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公开(公告)号：JPH11239078A
公开(公告)日：1999-08-31
申请号：JP31455098
申请日：1998-11-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MACLELLAN JOHN AUSTIN , SHOBER R ANTHONY
Abstract: PROBLEM TO BE SOLVED: To obtain an MBS system which has a processing gain regarding MBS background noises by using a wide-band uplink signal and a narrow-band downlink signal. SOLUTION: An interrogator 103 receives a reflected and modulated signal by a receiving antenna 206, amplifies it by a low-noise amplifier 207, and demodulates the amplified signal to the intermediate frequency(IF) of a single subcarrier by using the homodyne detection of a mixer 208. An information signal 211 transmitted with the IF subcarrier is demodulated by a subcarrier demodulator 212, which sends an information signal 213 out to a processor 200 to determine message contents. Only a desired signal modulated with a pseudo-random noise code of a rate is compressed and transmitted to the processor 200. In this case, the chip rate of a pseudo-random signal is higher than the data rate of a data signal and the data rate is, for example, a bit rate or symbol rate.
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公开(公告)号：JPH11220413A
公开(公告)日：1999-08-10
申请号：JP31454998
申请日：1998-11-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MACLELLAN JOHN AUSTIN , SHOBER R ANTHONY , WRIGHT GREGORY ALAN
Abstract: PROBLEM TO BE SOLVED: To efficiently utilize a usable band, which is to be changed with the time of an RE channel, and to be flexibly adaptive to it by reprogramming and rearranging (reconfiguring) at least one programmable device. SOLUTION: A system performance measuring and optimizing (SPM/O) block 110 is arranged inside a reception chain 124. The SPM/O 110 monitors the performance of a channel 105, digital demodulator 106, channel decoder 107 and source decoder 108. Then, it is determined as needed which one of blocks 102-104 in a transmission chain 128 and which one of blocks 106-108 in the reception chain 124 are to be dynamically reconfigured. When reprogramming is required, the SPM/O 110 instructs the reprogramming of the programmable device to a programming logic 22.
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公开(公告)号：JP2000049656A
公开(公告)日：2000-02-18
申请号：JP7268099
申请日：1999-03-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MACLELLAN JOHN AUSTIN , R ANTHONY SHOVER
Abstract: PROBLEM TO BE SOLVED: To provide a short-distance radio data communication from a central control point (interrogator) to many inexpensive end points (tag). SOLUTION: A tag 105 uses a modulation back-scatter method for a communication from the tag 105 to an interrogator 103. A new down-link protocol is used for data transmission from the interrogator 103 to the tag 105 and a new up-link protocol is used for data transmission from the tag 105 to the interrogator 103. Either protocol resends messages which are neither confirmed nor answered at random by using back-off/retry algorithm. The transmission capacity from the tag 105 to the interrogator 103 is improved more by using up-link subcarrier frequency-division multiplexing. In concrete, the tag 105 includes a sensor for temperature, smoke, or living body information and sends its output to the interrogator 103 with an up-link information signal.
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公开(公告)号：JPH10229350A
公开(公告)日：1998-08-25
申请号：JP56098
申请日：1998-01-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MACLELLAN JOHN AUSTIN , SHOBER R ANTHONY , WRIGHT GREGORY ALAN
Abstract: PROBLEM TO BE SOLVED: To allow one and the same interrogator to serve a plurality of applications by using a modulated sub-carrier signal, so as to modulate a reflected continuous wave(CW) radio signal. SOLUTION: An antenna 301 of a tag 105 receives a down-link signal 204a, and a 1st modulation signal is demodulated directly to a base band at a detector/modulator 302. A demodulated signal 302 is amplified, and synchronization is recovered by a clock recovery circuit 304. A recover signal 304a is analyzed by a processor 305. The processor 305 generates other information signal 306, depending on a content of an information signal 200a, and the signal 306 is returned to an interrogator. The information signal 306 is fed to a modulator control circuit 307, to modulate a sub-carrier 308a by using the information signal 306. A modulation control circuit 307 outputs a modulated sub-carrier signal 311, the detector/modulator 302 modulates a CW radio signal of a down- link signal 202a, to generate a modulated back-scatter signal 301a.
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Patent Agency Ranking
公开(公告)号：JPH1141135A
公开(公告)日：1999-02-12
申请号：JP1207098
申请日：1998-01-05
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To integrate passengers, baggages, cargoes, and containers by a single communication base without necessitating manual intervention at the time of reading data by providing an interrogator for transmitting a down-lank signal, and receiving a up-link signal, and a tag for receiving the down-link signal, and transmitting the up-link signal. SOLUTION: This system is provided with a radio frequency identifying system using a modulating back scatter, and a tag for transmitting data a various data rates is used. For example, a cargo container 810 having a container tag 820 is loaded through a door 840 of a cargo bay on an airplane 860. The container tag 820 is fixed to the cargo container 810, and the cargo container 810 can be identified when it is allowed to pass through a cargo handling facility, and the entrance or exit of the air plane or the like. An interrogator 103 at the upper part of a crane 850 reads an airplane tag 830, and communicates identification information indication which baggage, cargo, and container is loaded on the airplane 860, and the identification information of the door 840 of the cargo bay to a handling system.
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公开(公告)号：JPH10209914A
公开(公告)日：1998-08-07
申请号：JP1003098
申请日：1998-01-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MACLELLAN JOHN AUSTIN , R ANTHONY SHOVER , VANNUCCI GIOVANNI , WRIGHT GREGORY ALAN
IPC: H04B5/02 , G06K7/00 , H04B1/59 , H04L27/20 , H04L27/233
Abstract: PROBLEM TO BE SOLVED: To eliminate the influence of noises, etc., of an oscillator by using an orthogonal phase shift key and also to extend this key to a higher dimension in an MBS(modulation back scatter) system. SOLUTION: An application processor 101 communicates with the question units 103 and 104 via a LAN 102, and the units 103 and 104 communicate with one or plural ones of tags 105 to 107. The unit 103 receives and fetches an information signal from the processor 101 and sends a message (down link message) and then the continuous wave radio signals to the tags. The tags modulate the received continuous wave radio signals via an MBS system. An antenna is switched to a reflector state from an absorber state for radiation of the radio frequency by a modulation signal. Thus, the communication to the question units from the tags via the MBS system is made possible.
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公开(公告)号：DE69702493T2
公开(公告)日：2000-12-21
申请号：DE69702493
申请日：1997-12-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MACLELLAN JOHN AUSTIN , VANNUCCI GIOVANNI
Abstract: The present invention enables a Tag and Interrogator to exchange proprietary information using Modulated BackScatter (MBS) technology. This invention discloses a method for encrypting the RFID user's PIN and thereby making the interception and the subsequent illegal use of RFID accounts at least as difficult as a present day ATM cards. For example, the encryption method can be based upon the US Digital Encryption Standard (DES), either first or third level. The Tag's personal encryption key is only known by the financial database and the RFID Tag. This method can be applied to any type of financial, debt, identification, or credit card.
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公开(公告)号：CA2248507A1
公开(公告)日：1999-05-07
申请号：CA2248507
申请日：1998-09-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SHOBER R ANTHONY , MACLELLAN JOHN AUSTIN
Abstract: A modulated backscatter (MBS) system provides a processing gain over MBS background noise by using a wideband uplink signal and a narrowband downlink signal. The wideband uplink signal is generated by controlling the reflection of a narrowband downlink signal using a wideband data signal. The wideband data signal is generated by modulating a pseudo random signal with an information signal, where the chip rate of the pseudo random signal is higher th an the bit or symbol rate of the information signal.
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公开(公告)号：CA2218805A1
公开(公告)日：1998-06-30
申请号：CA2218805
申请日：1997-10-21
Applicant: LUCENT TECHNOLOGIES INC
Abstract: In accordance with the present invention, a radio frequency identification system, using modulated backscatter radio communications, is disclosed which supports the automated reconciliation of passengers, baggage, an d cargo on a transport. A baggage tag is attached to each piece of checked baggage , where the baggage tag is a read-only tag with modulated backscatter radio capabi lity. Thus, each piece of checked baggage can be identified for sortation, and also identified to ascertain if it has been loaded onto a particular aircraft. Pieces of baggage can be either loaded directly onto an aircraft, or loaded onto a cargo container; where a cargo tag is attached to the cargo container, the cargo tag i s a read-write tag with modulated backscatter radio capability. The aircraft itself may be equipped with aircraft tags, which could be read-only or read-write tags with modulated backscatter radio capability. Aircraft tags allow a positive associati on between the identity of the baggage or cargo container being loaded, the aircraf t on which it is being loaded, and the cargo bay doorway through which it is being loaded. To identify passengers, several alternatives are disclosed. In one embodiment, a magnetic boarding pass can be used with a magnetic stripe containi ng information about this passenger. In this embodiment, the passenger is responsib le for inserting the magnetic boarding pass into a magnetic card reader as the pass enger boards the flight. In another embodiment, a radio boarding pass could be used. T he radio boarding pass resembles a conventional boarding pass, however it has readonly modulated backscatter radio capability, perhaps identical with the technology used for the baggage tag. The radio boarding pass can be read as the passenger boards the aircraft. In an alternate embodiment, the passenger can have a passen ger card, which is a read-write tag with modulated backscatter capability. The passe nger card can be read as the passenger boards the aircraft, to identify the passenger . Alternately, the passenger card can be used for a number of enhanced passenger service applications in a generalized transportation environment.
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