Method and devices for use in a centralized wireless network are provided. The centralized wireless network employs a wireless communication protocol to communicate with various devices throughout the network. In addition to communication, the protocol may be used to control and monitor various aspects of the devices throughout the network.

Centralized wireless network for multi-room large properties

A tire characteristic monitoring method allows automatic programming of tire position information in a remote tire pressure monitoring system (10). The method includes, from a remotely located exciter (16) using a primary coil (18) to transmit a relatively low frequency signal to a secondary coil (L1) of a tire monitor (12) associated with a tire of a vehicle. The method further includes the step of, at the tire monitor, in response to the relatively low frequency signal, transmitting a relatively high transmitting signal to convey data. The data are received at the exciter and subsequently loaded into a receiving unit (14) of the vehicle.

Method and apparatus for a remote tire pressure monitoring system

A remote communication device, that receives temperature indicia concerning a container and/or its contents and communicates such temperature indicia along with an identification indicia to a reader. The remote communication device can measure and communicate temperature indicia associated with a container in a periodic manner. The remote communication device can also measure and communicate temperature indicia associated with a container when such temperature indicia exceed a certain minimum or maximum threshold temperature. The remote communication device can also include power circuitry to store energy when energized in the range of an interrogation reader so that the remote communication device can be powered for temperature indicia measurements when not in the range of an interrogation reader.

RFID temperature device and method

A method and a system of data transmission between a terminal for generating an electromagnetic field and a transponder, the terminal and the transponder each including an oscillating circuit forming an antenna, and the transponder including an electronic circuit adapted to absorbing and giving back power provided by the terminal field, the oscillating circuits of the transponder and of the terminal being capable of transmitting radio-electric signals of determined frequency, this method including causing a detuning of at least one of the oscillating circuits with respect to the determined frequency when the transponder and the terminal are very close to each other.

Operation in very close coupling of an electromagnetic transponder system

An identification tag is provided in which radio frequency (RF) circuitry and ultrawide bandwidth (UWB) circuitry are both provided on the same tag, along with some UWB-RF interface circuitry. The RF circuitry is used to detect when the identification tag must be accessed, and is used to connect the UWB circuitry with a power supply. The UWB circuitry then performs the necessary communication functions with a distant device and the power supply is again disconnected. In this way the power supply is only accessed when the UWB circuitry is needed and it's usable lifetime can be maximized.

Method and system for performing distance measuring and direction finding using ultrawide bandwidth transmissions

An anti-theft system for a motor vehicle includes a transceiver disposed in a motor vehicle and a portable transponder. If a magnetic alternating field of the transceiver is turned on, energy signals are transmitted inductively to the transponder, where they charge an energy storing device. As soon as the alternating field is turned off, a transponder oscillating circuit oscillates at its resonant frequency. This oscillation is transmitted inductively back to the transceiver. In the process, the resonant frequency is measured. Then, the exciter frequency of the alternating field is adapted to the resonant frequency of the transponder, so that the inductive energy transmission is as effective as possible in subsequent charging operations.

Anti-theft system for a motor vehicle

The central processor successively interrogates in a cyclic sequence via line trunk groups the in each case two concentrator processors provided in concentrators for temporarily stored data. Concentrators are set up for interworking with the central processor and with line trunk groups of in each case a relatively old and relatively new type of construction. The volume of the temporarily stored data to be transmitted on the basis of being interrogated depends on this type of construction. The concentrator extracts the type-of-construction feature from the interrogation signal and stores it. Each concentrator continuously non-destructively reads the temporarily stored data and outputs this to an interrogation station in the neighbouring concentrator processor as determined by the stored type-of-construction feature. If the central processor recognises that it is not reaching a concentrator, it interrogates the relevant data at the interrogation station in the neighbouring concentrator processor.

Circuit arrangement for communication exchanges, especially telephone exchanges, with distributed switching groups and central switching arrangements

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Anti-theft system for a motor vehicle

Circuit arrangement for communication exchanges, especially telephone exchanges, with distributed switching groups and central switching arrangements