33 results about "Telecommunications link" patented technology

Disclosed is an apparatus for a data storage library comprising at least one of a plurality of docking stations adapted to receive a disc drive magazine wherein the magazine comprises a plurality of disc drives. The docking station is adapted to receive the disc drive magazine via a loading device capable of automatically engaging the magazine with the at least one docking station to establish a communication link between the magazine and the at least one docking station. A retaining device is adapted to retain the magazine when engaged with the at least one docking station and when the magazine is in at least an active state. The library comprises at least one interface that is adapted to establish a communication link capable of transferring data between at least one data consumer and the library. The disc drive magazine when linked with the at least one docking station is capable of storing data received by the at least one data consumer. The magazine is capable of changing from a fully active state to at least one quiescent state when storage operations as performed by the magazine requires less than a fully active magazine.

Techniques that provide cost effective optical fiber communication links for HDCP transmission systems and the like are provided. A single fiber for bidirectional communication is enabled, without wavelength selective unit to achieve the HDCP transmission. One embodiment of the present invention has a forward channel using a light source (e.g., VCSEL at about 850 nm) in the GHz modulation level (e.g., 1 GHz or greater), and a corresponding photodetector. The backward channel has a light source (e.g., LED at 630 nm) in the MHz modulation level (e.g., 10 MHz or less), and a corresponding photodetector. One application is for realizing a home entertainment system (e.g., DVD player and high definition television) that employs an HDCP-enabled communication link to transmit copy restricted digital content.

In an automatic remote metering system in accordance with the invention a method is provided for reprogramming each client utility meter from a host computer by downloading a reprogram first program from the host to a corresponding hub utility meter fourth memory portion via a communications link, verifying integrity of the reprogram first program, and downloading the reprogram first program from the hub utility meter to the client utility meter via a radio frequency link and overwriting the client utility meter first program code with the reprogram first program code.

A method of distributing electronic audio or video content from a distributing computer system to a user device (such as a computer, PDA or mobile telephone) over a telecommunications network, comprising: the distributing computer system detecting at least one characteristic of the user device, the distributing computer system selecting a version of the content according to the characteristic, and the distributing computer system transmitting to the user device the selected version of the content. The invention also provides a method of processing electronic content comprising: encoding the content with programming code indicative of playback preferences, for facilitating preloading of the content, for detecting at least one characteristic of a user device or a communications link thereto, or any combination of these. The programming code may be inserted automatically or manually, and may comprise a link.

A hazardous materials sensing robot includes a robot platform and a universal mounting tray on the robot platform for removably mounting thereon a plurality of sensors each having an output. An electronic interface unit is configured to receive the outputs of the sensors. An operator control unit remotely operates the robot platform. There is a communication link between the robot platform and the operator control unit for transmitting the sensor outputs to the operator control unit.

In a method for repeat transmission of messages in a centrally controlled communication network including a plurality of terminals and a central station messages assigned sequence numbers are broadcast or multicast from the central station for reception by terminals of a participating group. As soon as a terminal detects loss of a transmitted message or an error in the transmitted message, it transmits a repeat request for repeat transmission of that message, which includes the sequence number of the lost or erroneous message, over another communication link, especially a point-to-point communication link. The central station repeats the message transmission of the lost or erroneous message but only until a predetermined maximum number of repetitions occurs within a predetermined time interval or until a positive acknowledgement of receipt of the previously lost or erroneous message is received.

The invention relates to a short wave communication reliability evaluation method based on multi-system detection data. The method comprises the steps of: calculating reflection point positions of a short wave communication link and all detection links, and selecting detection link data close to the reflection point position of an ionized layer of the short wave communication link; according to the determined reflection point positions of ionized layers of the detection links and the determined detection link data, forecasting an ionized layer parameter of reflection points of the ionized layers of the detection links; according to the determined reflection point positions of the ionized layers of the short wave communication link and the detection links and the forecasted ionized layer parameter of the reflection points of the ionized layers of the detection links, reconstructing an ionized layer parameter of the reflection point of the ionized layer of the short wave communication link; forecasting the highest available frequency of the short wave communication link by using a short wave propagation forecasting method according to the obtained ionized layer parameter; and calculating the received field intensity when the short wave communication link adopts the highest available frequency for communication according to the obtained highest available frequency, and analyzing the reliability of the short wave communication link.

A loopback test to test a communication link for a layered interface where in a master agent programs the electrical parameters for the slave agent, such as, the offset, timing, and current compensation with a loopback control register. The slave agent's transmitter and receiver are independently controlled and the master agent may use a slave-echoed data test pattern to detect errors and subsequently sets the appropriate status bits in a loop back status register

A multi-shelf communication system for a communication switch having shelves is provided. There is a master generating commands and receiving status signals, slaves associated with the master, a communication controller per slave, a downstream communication link providing a multiplexed signal of communications from each controller and providing a demultiplexed signal split from the multiplexed signal to each slave, an upstream communication link from each slave to its controller, and a timing arrangement controlling transmission times for the downstream communication link. Each slave can be located on one the shelves and receives commands, executes local commands responsive to the commands and generates status signals for the master. Each controller receives commands, transmits commands to its slave and receives status signals and provides information relating to the status signals to the master controller. Local commands replace other commands directed by the master to the slave. Each slave communicates independently with the master.

The embodiment of the invention discloses a method for upgrading master and slave MCUs, and aims at avoiding the waste of hardware resources and reducing hardware cost; meanwhile, each MCU does not need to be upgraded independently, so that the working time of an operator is saved, and the upgrading time cost is lowered. The method disclosed by the invention comprises the steps that a first-stage MCU acquires an upgrading file through an upgrading interface of the first-stage MCU, wherein the upgrading file comprises an upgrading program of an MCU to be upgraded; the nth-stage MCU acquires the upgrading file from the (n-1)th-stage MCU through a communication link, wherein n is greater than or equal to 2; the (n-1)th-stage MCU is cascaded with the nth-stage MCU; the upgrading program corresponds to the MCU; the MCU is upgraded according to the acquired corresponding upgrading program.

A master-slave communication system for a communication switch is provided. The system comprises a master controller generating commands and receiving status signals and slave devices associated with the master controller. Each slave receives commands, executes local commands responsive to the commands and generates status signals for the master controller. Each slave has a communication arrangement for signals transmitted between it and the master controller. The arrangement comprises a communication controller associated with the master controller. The communication controller receives commands, transmits commands to each slave, receives status signals and provides information relating to the status signals to the master controller; also the controller has a communication link which transmits commands to each slave and the status signals to the controller. The system allows local commands executed by the slaves to replace other commands directed by the master controller to the slave. Further, each slave communicates independently with the master controller.

Provided are a computer program product, system, and method for resource allocation in accordance with one embodiment of the present description, in which a resource allocation such as a buffer credit allocation for a port in a storage area network is initialized as a function of a measurement of a length of a communication link for the port of the storage area network. In one embodiment, the length measurement is a function of a minimum command response time of a command issued over the communication link. Other aspects of resource allocation in accordance with the present description are described.

The invention provides an interference blocking scheme switching method for millimeter wave cellular network uplink secure transmission. The interference blocking scheme switching method specificallycomprises the following steps: the step 1, taking an optimal cooperative user in K-1 cooperative users to carry out interference blocking and taking full duplex interference blocking of a base stationas an interference blocking scheme respectively; the step 2, calculating the safety throughput of a communication link when the K-1 cooperative users in the step 1 interfere, and taking the cooperative user corresponding to the maximum safety throughput as an interference node of an interference blocking scheme, meanwhile, calculating the safety throughput during full duplex interference of the base station in the step 1; and the step 3, comparing the communication link security throughput obtained in the step 2 with the communication link throughput when the base station interferes, and taking the interference blocking scheme corresponding to the maximum security throughput as the interference blocking scheme of the current time slot; According to the invention, the safety throughput istaken as an evaluation index, and the user position information is utilized to efficiently and flexibly switch between the two interference blocking schemes, so that the system always works in an environment with the optimal safety throughput.

The invention discloses a method for automatically switching a communication channel, aiming at solving the problems that the transmission efficiency of the existing emergency rescue command system in the single communication channel is seriously limited by the working state of the communication channel, and a worker can not easily select the optimal communication channel mode from multiple communication channels. The method comprises the following steps of firstly evaluating the transmission quality of the plurality of available communication channels to generate an evaluation result; determining the optimal communication channel according to the evaluation result; if information data need to be received and transmitted, automatically switching the optimal communication channel by a working channel; and giving the network parameters of the working channel to computers of the receiving part and the transmitting part to establish the communication link between the information receiving part and the information transmitting part. A cache device is also added into the method, and is used for carrying out breakpoint recording on the information data when a network is temporarily disconnected and carrying out breakpoint resume on the information data when the network is connected again; and after the transceiving process is finished once, the information data of the this time in the cache device are deleted.

The invention discloses a key verification method of a Bluetooth smart lock controller, and belongs to the field of smart locks. The key verification method comprises the steps of generating an unlocking key in an abstract form by regarding unlocking time, the time salt and the lock core ID of the lock main body of the Bluetooth smart lock as an original text; and synchronously updating the unlocking time which serves as the unlocking key original text at a lockset and the two ends of an intelligent terminal which serves as an unlocking key to form a dynamic key original text. The problem that the Bluetooth smart lock is directly decoded after a steady key ciphertext is intercepted is completely eradicated. No proclaimed or reversible ciphertext transmission related to the key exists on a Bluetooth wireless communication link, so that the attack difficulty is extremely great after the key is intercepted. Meanwhile, as a potential man-in-the-middle attacker does not master the unlocking time, the salted abstract cannot decode the unlocking time inversely, and a passive eavesdropper cannot obtain the correct unlocking time, the Bluetooth smart lock is difficult to attack.

The invention relates to an antenna switching method and a mobile terminal. The switching method comprises the steps of controlling an antenna switching unit to switch each WLAN (Wireless Local Area Networks) antenna to be connected with a radio frequency circuit in sequence within a preset period, thereby forming at least two communication links; obtaining the communication link with the fastestsignal transmission rate in the at least two communication links; and controlling the antenna switching unit to connect the radio frequency circuit with the WLAN antenna corresponding to the communication link with the fastest signal transmission rate. Through application of the antenna switching method, after a hand of a user holds partial antennas, the switching to the other antennas can be carried out successfully, so an antenna signal is not influenced, the network speed fluency is ensured, and the user experience is improved.

The invention discloses an electric energy meter system utilizing mobile terminal communication and a multi-communication channel electric energy meter system. The electric energy meter system utilizing mobile terminal communication comprises a cloud platform center, at least one mobile terminal and at least one electric energy meter. The electric energy meter is connected to the mobile terminal in a wireless communication way. The mobile terminal is connected to the cloud platform center by the mobile internet. The multi-communication channel electric energy meter system comprises a mobile terminal transmission channel and a transmission terminal transmission channel. Through use of the mobile terminal transmission channel with multiple communication ways and a transmission terminal transmission channel with multiple communication ways, the electric energy meter system provides multiple choices for electric energy meter and cloud platform center communication, realizes monitoring of the electric energy meter and data passthrough, improves communication link choosability, effectively improves communication reliability and has good economic and social benefits. The electric energy meter system can be widely used in various electric energy meter systems.

The invention discloses an Ethernet-based unmanned aerial vehicle formation flight control data link system and belonging to the technical field of unmanned aerial vehicle formation control. The Ethernet-based unmanned aerial vehicle formation flight control data link system includes a ground station computer, a wireless data transmission ground terminal and a wireless data transmission airborne terminal. The wireless data transmission airborne terminal is mounted on an unmanned aerial vehicle and connected to a serial port of the airborne computer of the unmanned aerial vehicle. The wirelessdata transmission ground terminal and the wireless data transmission airborne terminal form a one-to-one communication link, and the wireless data transmission ground terminal is connected to an Ethernet serial port server through a serial port level conversion module, and the Ethernet serial port server and the ground station computer are respectively connected to an Ethernet switch through a network cable to form an Ethernet local area network. According to the Ethernet-based unmanned aerial vehicle formation flight control data link system, mature hardware, such as wireless data transmission, the serial port server and the Ethernet switch, is selected for construction to provide a data chain solution with reliable work, strong performance and controllable cost for an unmanned aerial vehicle formation operation control system.

The invention discloses an interface configuration method. Bidirectional interface communication link point-to-point connections adopting standard protocols are configured between pole control, pole protection, direct-current busbar protection or direct-current line protection devices and a direct-current circuit breaker control device to be operated. According to the method, since the bidirectional point-to-point links are configured between the control and protection devices in a flexible direct-current system and the direct-current circuit breaker to be operated, the influence of the switching out of a single control and protection device on the operation of the direct-current circuit breaker by other operating devices can be avoided; a high-frequency fast tripping link is additionallyconfigured for a line protection device which needs quick switching out, so that the line protection device can reliably trip the direct-current circuit breaker at a high speed. The invention also discloses an interface configuration system.

The invention discloses a method of double-path capturing switching way confronting data transmission multi-path interferences. A plurality of capture branches are provided, and one of the capture branches can be used as a wireless data transmission system default branch, and other capture branches can be used as auxiliary capture branches. The plurality of capture branches are provided with control signal capturing and processing modules at the same time, and during the initial working of the wireless data transmission system, the wireless data transmission system default branch can be used for the capturing, and after the data decision of the wireless data transmission system default branch, a communication link can be established. When the wireless data transmission system is under the influence of the multi-path interferences, and is in the unstable working state, the auxiliary capturing branches can be started automatically, and the control signal capturing and processing module of the auxiliary capturing branches can be used for the selecting and the switching of the paths, and therefore the wireless data transmission system can be used for the data information transmission via the effective demodulation path, and the probability of the capturing carried out via the stable transmission channel can be effectively improved.

The invention discloses a low-complexity space-frequency adaptive anti-interference channel equalization method, and the method comprises the steps: partitioning data at a transmitting end, and addingUW to the tail of each data block; then, enabling the sending signal to arrive at a receiving end and subjecting to timing synchronization preprocessing, and intercepting a received pilot frequency;and respectively performing DFT (Discrete Fourier Transform) on the receiving pilot frequency of each path of antenna to a frequency domain; carrying out sub-band segmentation on the received pilot frequency in a frequency domain, and calculating an optimal time domain adaptive weight of each sub-band; partitioning received data, performing DFT (Discrete Fourier Transform) to a frequency domain, performing sub-band segmentation by using the same method, solving an adaptive weight of each sub-band, performing sub-band space-frequency equalization and combination on a received data block on eachantenna by a receiving end, converting the data block to a time domain, and performing UW (Unscented Wavelength) removal operation. The method is effective in sight distance and non-sight-distance environments in a wireless communication system, has a certain inhibition capability on multipath self-interference and external interference, and effectively improves the survivability of a communication link in a complex electromagnetic environment.

A long-range optical instrument for transmitting information to a peripheral device and a method for enabling communication between the long-range optical instrument and the peripheral are provided. The long-range optical instrument includes a near-field radio communication module. The near-field radio communication module is configured to establish a communications link with the peripheral device and to transmit data, in particular information concerning the long-range optical instrument, to the peripheral device over the communications link.

The invention relates to an alarm system and method for monitoring air interface link completeness of an LTE private network base station. The system is mainly composed of an antenna feeder system, anLTE base station air interface link detection device, a communication application server, a centralized alarm database, a guarding alarm terminal, a wired Ethernet communication connection cable or optical fiber and the like. According to the system, a wireless communication link and wired communication link closed-loop monitoring method is adopted, and a monitoring reflection result has system working state completeness. By applying the system, the working state and alarm information of each base station along the railway can be remotely checked and displayed through the visual alarm terminal, and operation and maintenance personnel are helped to quickly position problems and efficiently process faults according to alarm instructions of the alarm terminal.

A technique is disclosed that provides a conduit for enabling a private branch exchange, or other data-processing system, to initiate the performance of a function on a cellular telephone or other off-premises telecommunications terminal that is affiliated with the exchange. The conduit comprises a client application that resides on the off-premises terminal that observes the calling party identifier of all incoming calls. When the private branch exchange desires to initiate a function on the terminal, the exchange dials the terminal and postpends dialed digits by using dual tone multi-frequency signaling, where the dialed digits identify the particular function call and the arguments of the function. When the client application on the telecommunications terminal determines that the value of the calling party identifier is from the private branch exchange of the illustrative embodiment, the application looks for the postpended dialed digits and, upon finding them, initiates the function that corresponds to them.

The invention provides a link detection method and device, electronic equipment and a storage medium, and relates to the technical field of micro-services. The method can be applied to a detection node in a micro-service system, and the micro-service system comprises the detection node and at least one service node; at least one micro-service is deployed on each service node, the micro-services are configured to communicate through a preset network communication protocol, and when a plurality of micro-services communicate each time, the micro-services communicate through the preset network communication protocol. The detection nodes can monitor and acquire communication data among the plurality of micro-services through the service nodes, and determine communication link information among the plurality of micro-services according to the communication data among the plurality of micro-services; according to the method, the communication link diagram is generated according to the communication link information among the multiple micro-services, the whole micro-service system can be monitored through the communication link diagram; the method has the advantages of being simple in design and high in applicability, and the maintenance cost can be effectively reduced.

A method and redundant control system for an actuator in which two redundant control computers are connected via buses to a respective peripheral station containing an interface module and at least one periphery module, wherein the actuator is connected to mutually decoupled signal outputs of two periphery modules, each forming an output module, of the two peripheral stations, where output values generated by the two redundant control computers for the actuator are transmitted by the interface modules to the output modules, wherein upon detection of a bus fault, the respective interface module transmits a command to all downstream output modules to output substitute values, and where output modules to which the actuator is connected exchange information about receipt of the command via a communication link and implement it only if another output module concerned has also received the command so as to prevent failure modes in redundant operation.

A wireless network includes a plurality of access points with at least pairwise overlapping wireless coverage, each of the access points comprising an OFDMA modulation system and a channel scheduler coupled to the OFDMA modulation system which is configured to set up a number of virtual wireless interfaces of the access point, each virtual wireless interface being associated with a dedicated set of subcarriers within the OFDMA spectrum. At least one first of the virtual wireless interfaces is configured to host all communication links between the access point and local mobile clients to the access point. A least one second of the virtual wireless interfaces is configured to host communication links between the access point and one of the neighbouring access points.