78 results about "Simplex communication" patented technology

A wireless control system for ground-mobile robotic systems in which communication between the operator control unit and the unmanned ground vehicle is transmitted via a plurality of spectrally efficient simplex communication links.

A system and method for collecting data generated by a plurality of metering devices located within a geographic area. The mobile automatic meter reading system provides two-way simplex communication capabilities between a mobile receiving device and a plurality of endpoint devices on a plurality of communication channels. The mobile collector device efficiently and accurately communicates with and receives data from the endpoint devices while moving throughout a localized geographical area. Aspects of the invention thereby improve the effectiveness of automatic meter reading systems.

A method of employing multipath propagation in wireless radio communications uses an omnidirectional transmitting / receiving antenna at one end of a transmission link to send an interrogating signal across an environment subject to multipath disturbances to a phase-conjugating retrodirective antenna, and the retrodirective antenna returns a communication signal along the multiple pathways taken by the interrogating signal to the omnidirectional antenna despite the multipath disturbances. In a simplex communication mode, the retrodirective antenna sends a return signal mixed with a communication signal to the omnidirectional antenna. In a duplex communication mode, both an omnidirectional antenna and a phase-conjugating retrodirective antenna are operated in tandem at each end of the transmission link to provide effective two-way wireless radio transmissions.

A system and method for communicating DisplayPort information is provided. The system includes: a local unit comprising a local controller operable to produce a request packet in response to a DisplayPort request received by the local unit from a DisplayPort source unit and to transmit the request packet to a remote unit of the system via a first simplex channel of a dual simplex communications link; and the remote unit comprising a remote controller operable to produce a reply packet in response to a DisplayPort reply received by the remote unit from a DisplayPort sink unit and to transmit the reply packet to the local unit via a second simplex channel of the communications link. The system allows distances between the source and sink greater than otherwise possible under the DisplayPort specification, and can communicate DisplayPort and non-DisplayPort signals via a variety of types of communications links.

An imaging system that implements a PCI Express high-speed serial interface system is disclosed in which a plurality of point-to-point simplex communication channels are established to realize a data communication network having a tree structure. The imaging system includes a PCI Express high-speed serial interface, and plural independent image processing units as end point devices of the tree structure that are connected by the PCI Express high-speed serial interface.

The invention provides a wireless energy and signal synchronous transmission system based on a multi-resonant technique, relating to the technical field of wireless power transmission and aiming to solve the problem that stable power output can not be obtained as the transmitted energy is affected by amplitude modulation in existing energy and signal synchronous transmission methods. The system has the beneficial effects that LC series-parallel circuits with a plurality of resonance points serve as primary / secondary side resonance matching circuits, so that different frequencies are used for energy transmission and communication respectively, thus minimizing mutual effects of energy and data while energy and data synchronous transmission is achieved; the system can be applied underwater and underground and to other media based on the communication mode of near-field resonant coupling; the system can achieve full-duplex communication and half-duplex communication of primary and secondary sides, simplex communication from the secondary side to the primary side and simplex communication from the primary side to the secondary side while energy is continuously transmitted, without extra antennae, and can lengthen the distances of energy transmission and communication by increasing the relay; the system is suitable for wireless energy and signal synchronous transmission.

The present invention generally relates to systems and methods for authenticating transactions through a simplex communication. To allow trusting the transaction with a payment by an image code such QR code, the invention proposes means to authenticate said transaction. For that, when the mobile payment application is loaded into preferably a secure element of the user mobile device a registration process is enabled. During this registration process on a server, an account of the user is created and a set of unpredictable numbers in quantity N is generated. This set of unpredictable numbers is transmitted to the mobile payment application for storage. The payment application uses the stored set of transaction unpredictable numbers for next N times transactions performed by the mobile payment application for transaction cryptogram calculation. The same transaction unpredictable number is recovered in the server side during the transaction authorization process.

The used condition of a simplex communication apparatus is notified with a light-emitting device attached to the communication apparatus. It is determined whether a communication mode of the simplex communication apparatus is a transmission mode or a standby mode. A sound pick-up state of a sound carried by a speech signal to be transmitted is determined if the communication mode is the transmission mode. The light-emitting device is controlled so that it is turned off, turned on or repeatedly turned on and off based on determination results of the communication-mode determination and the sound pick-up state determination.

The invention discloses an information transmission method of an entrance guard system, and an entrance guard system. The information transmission method comprises the steps that: a control-receiving terminal receives visible light signals representing identification information, and converts the visible light signals into digital signals; the digital signals are transmitted to a controller in a Wiegand format; the controller receives the digital signal in the Wiegand format, and carrying out authentication upon the identification information; if the identification information is authenticated, high-level or low-level feedback signals are transmitted to the control-receiving terminal through a serial port; and through the serial port, the control-receiving terminal receives the feedback signals with a manner of detecting rising and falling edges. With the method and the system provided by the invention, the entrance guard system control-receiving terminal can be prevented from being restricted by Wiegand signal simplex communication, such that a situation of signal feedback transmission failure is prevented.

Provided is a system and method for active multispectral imaging having a transmitter that uses narrowband optical radiation to dynamically illuminate an object with modulated structured light in multiple spectral bands, and a receiver that includes an independent panchromatic imager. The transmitter and receiver can be operated in a bistatic decoupled configuration to enable passive multispectral synthesis, illumination-invariant sensing, optical communications, and the ability for the transmitter to emit a sequence of spectral bands in an order that is unknown to the receiver, and the receiver is able to passively decode the spectral identity from a band identifier embedded in the modulated structured light. The receiver passively decodes embedded high-bandwidth simplex communications while reconstructing calibrated multispectral images at video frame rates.

This invention discloses one method and system to realize computer inside and outside network safe communication based on single machine communication computer, which prevents physical outside network to steal and damage inner net information by establishing single direction transmission wire between inner and outer net and outer computer and at same time establishes outer safety control computer for coding to realize inner net transmission safety management.

The invention relates to a mobile phone and an application method thereof, wherein the main body of the mobile phone can be provided with a module which can store a plurality of mobile bank fund accounts and a plurality of dynamic password groups at the same time and has the password safety protection function and the POS (point of sale) machine near-field payment function. The mobile bank fund accounts and the dynamic password groups are memorized in read only memories (ROMs) of an integrated circuit (IC) card, wherein the ROMs stimulate the standard shape of a subscriber identity module (SIM) card; different mobile bank fund accounts are respectively memorized in different ROMs of the IC card; and the user selectively uses more mobile bank fund accounts by inserting and changing different ROMs of the IC card. The module which is provided with the ROMs of the IC card establishes the only communication relation through an element and a base band or the SIM card or a coprocessor, wherein the element is used for realizing the simplex communication. The safety of the passwords memorized in the ROMs of the IC card is protected by replying the circulating long-string dynamic password groups. The module carries out near-field communication for the POS machine by the connection of the base band or the SIM card or the coprocessor with a coupling module antenna.

The device and method disclosed deals with the operation of a cross-band simplex radio frequency communications system. In a system having a first band receiver on a first radio frequency band for receiving and demodulating a first received signal, and a second band transmitter using a second radio frequency band to modulate and transmit the demodulated first received signal so as to communicate audio and signaling received by the receiver in one band to the transmitter of another band when in a cross band mode. There is also at least a second band receiver using the second radio frequency band typically associated with the second frequency band transmitter for receiving signals containing audio and signaling which is to be communicated to a first band transmitter so as to reply to the signal received on the first band receiver. A method of the invention disclosed includes the steps of: detecting the occurrence of a predetermined condition associated with the first received signal in the first band receiver; and replacing transmission of the demodulated signal received on the first band receiver with a breakthrough signal for a first predetermined time; ceasing transmission from the second band transmitter; and receiving on the second band receiver for a second predetermined time and determining if a signal is received on the second band receiver and if so allowing remote operation of the first band receiver of the single frequency simplex communications system.

The invention discloses a hop-by-hop reliable transmission control method for an underwater wireless sensor network. Based on a digital fountain code technology irrelevant to a code rate, optimized degree distribution and recursive coding ideas are adopted, and an RLT (recursive LT) coding scheme is designed, so that rapid and efficient coding and decoding are realized; packet collision and end-to-end delay are reduced; and the network throughput is increased. Through collection of feedback information of a receiving node, the packet corruption probability of an underwater acoustic channel is accurately estimated, and the coding packet quantity of next transmission is further computed, so that the transmission overhead of extra packets is reduced. The fourth-layer reliable transmission mechanism and the second-layer medium access control mechanism of a conventional TCP / IP (Transmission Control Protocol / Internet Protocol) protocol stack are organically fused, so that block-by-block and hop-by-hop reliable transmission of the underwater wireless sensor network is realized on the basis of RLT coding, and transmission-reception conflicts, multi-transmission-single-reception conflicts and data-ACK conflicts caused by simplex communication of an underwater Modem are reduced. As an effective and practicable technical scheme, the method has a good application prospect.

A device and method for transmitting digital information, where the Transmission takes place from an information-providing entity (71) to a final destination entity (81). It is significant that the digital information to be sent from the first data communication device (70) to the second data communication device (80) is divided into at least two information sections (30-34), that every information section (30-34) is transmitted from the first data communication device (70) to the second data communication device (80) via a separate Transmission (20-24), that Transmissions (20-24) take place in the form of simplex communication, and that the information in the information sections (30-34) is put together in the second data communication device (80) for receipt of the information coming from the information-providing entity (71).

The invention discloses a high transmission load bearing detection cable. The high transmission load bearing detection cable comprises a plurality of cable conductors, insulation layers, a shielding layer, and armoring layers. The plurality of cable conductors are used for transmitting signals; the insulation layers wrap the cable conductors and perform insulation separation among the cable conductors; the cable conductor is wrapped by the insulation layer to form a cable core; a shielding layer is arranged on the outside of the insulation layers to shield various interferences; the armoring layers are arranged on the outside of the shielding layer and are obtained through armoring of a plurality of steel wires; double-stranded-wire-structure cable cores exist among the plurality of the cable conductors and each double-stranded-wire-structure cable core is obtained through two cable conductors, which improve a cable signal transmission speed. The high transmission load bearing detection cable improves a twisting mode of a cable core and the two cable cores in the middle adopt a double-stranded-wire mode, which effectively inhibits common mode interference; the double-stranded-wire communication mode is beneficial for transmission modes of a Manchester code, DSL, OFDM, etc; even under a strong interference environment, the double stranded wire can transmit quality images and signals; the double-stranded-wire cable can realize duplex communication, replaces a traditional simplex communication mode and increases the transmission speed of the cable from 200kbs to 5Mbps.

The invention discloses a space division multiple access visible light wireless access system, which comprises the following parts: access exchange (2), center side fiber optic array(1) which is composed of several center side fiber optics (4) and several user side fiber optics (3), wherein the access exchange (2) connects several center side fiber optics (4) through interface cable (16); the center side fiber optics (4) of center side fiber optic array(1) aim several user side fiber optic (3) by visible light laser beam which makes up communication chain circuit; the communication chain circuit can use upward and descending two parallel laser beams to makeup duplex communication relation with corresponding point and use descending laser beam to makeup simplex communication relation with corresponding point. The invention reduces the cost, which is convenience to fix.

The present invention supports a packet-based communication by emulating the functions of an enhanced mobile radio system. The communication device executes emulation software to support simplex communications, as well as other communication features such as voice mail, electronic mail, or public switched telephone network communications. Communications to and from the devices configured with emulation software can also be controlled with a presence routine.

The invention discloses a simplex communication and recognition method based on a mine lamp. According to the communication and recognition method, through control over brightness of the mine lamp, simplex communication from the mine lamp to a video receiving end is completed by using an underground wired communication network and an underground video collecting system which are built already in most coal mines, so that mine lamp recognition for a user is completed. The communication and recognition process is simple, effective, high in electromagnetic interference resistance and high in robustness, it is unnecessary to individually add a wireless communication base station and the wired communication network underground to use a communication system of the communication and recognition method, and therefore the communication and recognition method has the advantages of being low in cost, simple in structure of system equipment, easy to implement and the like; underground workers can be tracked and monitored rapidly and effectively, which is beneficial to management of a safety production manager.

The invention discloses a method for one-key alarming, comprising the following steps: when a call center receives an alarm request sent by an alarm sending device, calling an alarm reception device; and when the call center is in call completion with the alarm reception device, sending an audio and / or video to the alarm reception device by the alarm sending device. The invention is also provides a corresponding device and system. According to the method, the device and the system for one-key alarming, a simplex communication mode is adopted after an alarm-giving person alarms, and the alarm reception device unilaterally receives the audio and / video sent by the alarm-giving person so as to improve the concealment and the safety of the alarm.

The invention discloses a two-wire controlled passive electronic lock cylinder, and relates to the technical field of safety and theft prevention. The passive electronic lock cylinder consists of an intelligent key and a lock cylinder, wherein the working power supply of the lock cylinder is from the intelligent key, and two-wire control is adopted between the lock cylinder and the intelligent key. The lock cylinder consists of a microprocessor, a control module connected with the microprocessor, an execution mechanism connected with the control module, a diode D1 and a storage capacitor C1; the XIN and XOUT pins of the microprocessor are connected with the control module through the diode D1; the diode D1 is grounded through the storage capacitor C1; and the XIN and XOUT pins of the microprocessor are combined together to realize simplex communication together with the intelligent key. Because of a few control wires, the lock cylinder has simple design and process, low manufacturing cost and high reliability.

The invention relates to a method for implementing simplex communication based on a mobile phone terminal. Currently, when an interphone is in conversation, the voice thereof is unidirectional and few resources are occupied, however, the definition of the voice is relative poor, and signals can be easily interfered during conversation, so the conversation quality is poor. The invention provides the method for implementing the simplex communication based on the mobile phone terminal. The method is as follows: the mobile phone terminal dials a target number to start calling, and then a public network exchanger receives a calling signaling so as to forward a speech channel to an increment platform; after a called response is answered, a relay module builds speech channel butt and sends a butt time slot channel to an exchange module, and then the exchange module builds initial one-way voice exchange from calling to incoming call; a user presses a listen / speak key on the mobile phone terminal, a mobile phone software module simulates the key to transmit a dual-tone multifrequency (DTMF) key signal to the increment platform; a DTMF module monitors the key signal corresponding to the relay time slot in real time and analyzes whether the key signal is a simplex communication key signal; and after the key is matched, and the exchange module finds out the corresponding relay time slot and changes voice direction, the simplex communication between the mobile phone terminals is realized.

The invention provides a reception level acquisition system for an FSK (frequency-shift keying) wireless transceiver circuit and a method thereof, and relates to a reception level acquisition technology. The method comprises the following steps: (1) a master machine device and a slave machine device form a two-way simplex communication system; the master machine device actively makes a call, the slave machine device answers a message after receiving the call from the master machine device, and then the master machine device receives the answered message and then completes one-time transceiver communication; (2) for a plurality of the slave machine devices, the master machine device sequentially carries out transceiver communication with the slave machine devices; and (3) when the master machine device carries out transceiver communication with the slave machine devices, the master machine device and the slave machine devices acquire FSK reception level. The invention can be applied to a short-distance wireless transceiver and a middle and long-distance mobile communication optical fiber relay system for acquiring the FSK reception level as the monitoring quantity of the working condition of the FSK transceiver circuit.