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2185 results about "Data transmission systems" patented technology

Data Transmission System: A typical data transmission system contains the information source from which data has to be transmitted through a suitable medium to the destination, termed the information sink.

Method for authorizing in data transmission systems

The invention relates to a method and to a device for the authorization in data transmission systems employing a transaction authorization number (TAN) or a comparable password. According to a first step, the user sends a qualifying identification of the data input apparatus together with a request for the generation or for the selection of a transaction authorization number TAN or of comparable password from a data file from the data input apparatus to an authorization computer. In a second step the authorization computer generates the transaction authorization number TAN or the comparable password or selects them form a data file. According to a third step, the authorization computer sends the transaction authorization number TAN or the comparable password over a second transmission path different from the first transmission path to a monitor, for example a pager. According to a fourth step, the user reads this transaction authorization number TAN or the comparable password from the receiver and enters the transaction authorization number TAN or the comparable password into the data input apparatus. According to a fifth step, this transaction authorization number TAN or the comparable password is transmitted to the authorization computer. According to a sixth step, the authorization computer verifies the validity of the transaction authorization number TAN or of the comparable password in order to establish or switch free, according to a seventh step, a connection between the data input apparatus and the receiver unit.

Area road network traffic safety situation early warning system and method thereof

The invention discloses an area road network traffic safety situation early warning system and a method thereof. The system comprises monitoring equipment, a data transmission system, a data process system and an early warning system. The method comprises the following steps: acquiring data information of road traffic, meteorology, illegal behaviors, and accidents through the monitoring equipment; sending the data information through the data transmission system; carrying out a multiple heterogeneous treatment on the acquired data information through the data process system, and merging data of the same kind; analyzing and assessing early warning grade through the early warning system, and determining and publishing a early warning scheme. Thereby road network traffic safety situation information can be comprehensively grasped, and dangerous source existing in the road network can be discovered timely to determine an early warning grade and generate an intelligent early warning countermeasure. Pertinence, instantaneity and validity of a measure of a road traffic management department actively preventing traffic accidents are improved. Technology support is provided in the invention to reduce area road network traffic risk factor and prevent major and extraordinarily serious road traffic accidents.

Inductive data and power link suitable for integration

ActiveUS20050063488A1Increase powerImproved telemetry systemElectric signal transmission systemsDiagnosticsData synchronizationTime distortion
A system providing an inductive power and data link between an external transmitter and miniature internal receiver is presented. The system is suited to applications where the receiver must be of a small size and the system must consume very little power, such as an implanted biomedical device. The system is also compatible with systems where bi-directional communications are required. The novel transmitter and receiver form an improved forward data telemetry system. The transmitter consists of a Class-E converter with its optimum operating frequency being synchronously, instantaneously and efficiently altered in accordance with the data to be transmitted, thereby producing an FSK modulated magnetic field of substantially constant amplitude. The constant amplitude output allows for the continuous, data-independent transfer of power to the miniature receiver and its associated electronics. The present invention also represents an improvement over the high efficiency Class-E converters previously patented by the inventors. The receiver consists of a coil and an integrated rectifying system to recover operating power from the incident magnetic field, as well as an FSK demodulator whose operation is based on the multiphase comparison of charging times of integrated capacitors. The described FSK demodulator approach removes deleterious effects resulting from low-frequency changes in the transmitter frequency, and eliminates time distortion artifacts generated by circuit imbalances and asymmetries in the power recovery process. The combination of the transmitter and receiver improvements yields a reliable data transfer system unaffected by circuit imbalances and incidental variations in the amplitude and frequency of the magnetic field.

Broadband communication systems and methods using low and high bandwidth request and broadcast links

Broadband data transmission systems and methods that provide point-to-multipoint broadcasting capability to implement Internet access and multimedia distribution services for a very large number of users. An exemplary system comprises a two-way communication link having at least one satellite, at least one user terminal that has two-way communication with the two-way communication link, and at least one gateway that has access to data and has two-way communication with the two-way communication link. The two-way communication link may comprise a low bandwidth two-way communication link, or a low bandwidth request link and high bandwidth data broadcast link. The high bandwidth link preferably broadcasts a wide area coverage beam to allows the requested information to be received by many terminals. The terminal and gateway may each include a cache. Software at the gateway operates to deliver requested data and related data to users using the user's request history and/or user profile. The requested (and related) data (such as a predetermined number of most-requested web pages) may be broadcast at predetermined intervals to simulate real-time broadcasts. Another exemplary system comprises a terrestrial communication link for communicating data requests, a satellite broadcast link for transmitting the requested data, at least one gateway having access to data that communicates with the terrestrial communication link and the satellite broadcast link, and at least one user terminal that communicates with the terrestrial communication link and the satellite broadcast link that caches the requested (and related) data transmitted by the satellite broadcast link. Broadband data transmission methods are also disclosed.
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