摘要:
A published document comprises a printed document and at least one memory attached to the printed document, wherein said at least one memory comprises an electrical circuit without an integral power source but may be powered wirelessly so that it may transmit information wirelessly, wherein at least a portion of the information stored in the published document for display to the user is provided in said at least one memory. A method of viewing information in such a published document comprises viewing information printed in the printed document, powering the memory circuit with a reader device to transmit information stored in the memory circuit to the reader device wirelessly, and displaying the information stored in the memory circuit by means of the reader device for viewing by the user. An appropriate reader device and method for publishing the document are described.
摘要:
A security document, comprises a printed document and one or more memory circuits adapted to be read wirelessly attached to or incorporated within the printed document, wherein data in the memory circuit is protected from access by an unauthorised reader, and wherein the memory circuit is physically isolated so as to inhibit physical tampering or to indicate when physical tampering has occurred. Methods of publishing and of reading such security documents are described.
摘要:
Embodiments relating to a memory tag having a resonant circuit part and a non-volatile memory is presented. The resonant circuit part can be made operable, in response to a reader signal received from a reader, to provide power to the memory, the tag being operable to read the memory and transmit data stored in the memory in response to the signal from the reader. The data is stored in the memory in a plurality of data units, with each data unit having an associated sequence number. The tag is operable to store the sequence number of the data unit to be transmitted in a register in the non-volatile memory. When power is supplied to the memory, the data units are transmitted in sequence, where the first data unit to be transmitted depends on the stored sequence number.
摘要:
Embodiments enable controlling a proximity transaction between first and second communications devices, each of which is provided with a short-range transceiver. In an exemplary embodiment, the first communications device has an RF/ID reader, and the second communications device has an RF/ID tag, the RF/ID tag containing the same identifier information as the second communications device. The second communications device is positioned within the range of the reader of the first communications device. Then, the transceiver of the second communications device transmits a transaction request and the identifies information of that device to the first communications device. The reader of the first communications device then interrogates the tag of the second communications device and the transaction is completed upon the reader of the first communications device receiving identifier information from the tag of the second communications device that is identical to the identifier information already received.
摘要:
The presence of persons is detected, for example, by detecting short-range communication devices carried by the detected persons. The interests of the detected persons are then determined by reference to specific interests transmitted by the user devices and/or by reference to customer profile data. The discovered interests of the current detected persons are then used to select content for display on an electronic display during a next display slot. The display is spaced from the zone in which the persons are detected, being located at a downstream location through which most of the detected persons will pass.
摘要:
A signal quality parameter in a wireless network supporting plural network user devices is measured. Each user device measures a predetermined signal quality parameter of signals received from each of the other user devices in the network. Each user device broadcasts the measurements to other user devices in the network. Each user device calculates, for each of the other user devices, a value for the predetermined signal quality parameter from all the received measurements associated with that other user device.
摘要:
The proximity of potential customers to a shop is detected, for example, by detecting short-range communication devices carried by passers-by. The interests of the detected passers-by are then determined by reference to specific interests transmitted by the passer-by devices and/or by reference to customer profile data. The discovered interests of the current passers-by are then used to select content for display on a shop-window electronic display during a next display slot. Passers-by who may be particularly interested in the displayed content are preferably sent an alert. In other embodiments, the targeted audience is a static group, such as train passengers, with the targeted information being displayed at a station.
摘要:
A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected to the radio frequency source, the detector resonant circuit part comprising an antenna, the detector further comprising a power monitor responsive to the power of a reflected signal returned from the detector resonant circuit part, the power monitor being operable to generate an output in response to the power of the reflected signal, wherein a decrease in the power of the reflected signal indicates the presence of a tag in the vicinity of the antenna.
摘要:
Access to a wireless data network to nodes located in a defined operational area is limited by transmitting a network signal within the defined operational area while transmitting a wave that can cause destructive interference with the network signal into a prohibited area adjacent to the defined operational area. The wave that can cause destructive interference is produced by phase and/or amplitude modulating the network signal. The modulation of the network signal includes sweeping the phase and/or amplitude.
摘要:
A method of transferring high rate data between a first communications device (32) and a second communications device (1) is disclosed. The second communications device (1) has a first transceiver (4) for communication with the first communications device (32) at a first, low data rate over a long range, and a second transceiver (2) for communicating at a second, high data rate over a short range. The method comprises the steps of forming a coordinated short-range network (piconet) using the second communications device (1) and a plurality of other similar communications devices (11, 21), transferring a portion of said data to or from the first communications device (32) from or to each of said second communications device and said other communications devices using their first transceivers (2, 12, 22), and transferring said data portions between said other communications devices and the second communications device using their second transceivers (4, 14, 24).