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62results about How to "Avoid communication interruption" patented technology

Standard measurement unit and method used for electric energy metering remote on-line monitoring system

The present invention relates to a monitoring system, and discloses a standard measurement unit and method used for an electric energy metering remote on-line monitoring system. The standard measurement unit used for the electric energy metering remote on-line monitoring system comprises a current input card, a voltage input card, a load sampling card, an error calculating card and a motherboard, and the current input card, the voltage input card, the load sampling card and the error calculating card are all connected with the motherboard to transmit the signals mutually. The measurement signals are inputted from the current input card, the voltage input card, the load sampling card and the error calculating card separately and are processed, and then a standard electric energy pulse signal is outputted via the motherboard. According to the present invention, by adopting a secondary loop measurement method and a pulse comparison method, and by the error calculating card, various functions, such as the standard measurement, the error calculation, the offline setting, the system calibration, etc., are realized, so that the monitoring system possesses a stronger anti-interference capability and a higher reliability, and the measurement precision of the monitoring system is also improved substantially.
Owner:ZHEJIANG HARNPU POWER TECH +1

Frequency point switching anti-interference wireless local area network communication method and device

The invention provides a frequency point switching anti-interference wireless local area network communication method and device, and the method comprises one anti-interference access point and a plurality of anti-interference terminals, and the anti-interference access point and the anti-interference terminals are developed based on an IEEE 802.11 software radio platform GRT system. According tothe invention, idle channels with less interference are selected for communication by using wireless spectrum sensing, so that the influence of busy channels or channels with more interference on thecommunication quality is effectively reduced; through random frequency point switching among a plurality of channels, communication interruption caused by burst interference in a single channel is avoided; besides, even if a channel in communication is interrupted by sudden interference, the alternative channel list carried in the beacon frame can enable the anti-interference access point and theterminal to be switched to other channels at the same time for continuous communication, so that the robustness of the system is improved; on the premise of having high compatibility with WiFi, compared with the prior art, the influence of interference in a channel on the communication rate and reliability is remarkably reduced.
Owner:PEKING UNIV

Receiving equipment, transmitting equipment, and line fault processing method and system

The invention provides receiving equipment, transmitting equipment, and a line fault processing method and system. The receiving equipment comprises a receiving-end line fault processing module, a multiplexer, at least two receiving modules and at least two transmitting modules respectively corresponding to the receiving modules, wherein the receiving-end line fault processing module is used for receiving line fault information and transmitting a line fault notice generating instruction to the transmitting modules corresponding to the receiving modules; the transmitting modules are used for generating line fault notices and transmitting the line fault notices to the transmitting equipment so as to make the transmitting equipment issue an effective data unit to other receiving modules, except for the receiving modules corresponding to a communication line identifier, of the receiving equipment; the receiving-end line fault processing module is further used for transmitting a first recombination strategy updating instruction to the multiplexer; and the multiplexer responds to the first recombination strategy updating instruction and performs recombination processing on the effective data unit received by the other receiving modules so as to acquire the data transmitted by the transmitting equipment.
Owner:RUIJIE NETWORKS CO LTD

Adaptive robust video coding method based on millimeter wave system

ActiveCN108810535ARealize multipath transmissionEnsure smooth transmissionDigital video signal modificationFountain codeTensor decomposition
The invention discloses an adaptive robust video coding method based on a millimeter wave system. The method includes the following steps: performing tensor decomposition significance extraction on avideo source, and allocating video contents to an encoder in combination with the code rate allocation; and controlling the encoder to operate through scene modeling, specifically including the following situations: if a line-of-sight path and a relay path are unobstructed, adopting an HEVC encoder, and determining the number of coding paths of an adaptive multiple description encoder by combiningthe number of communication paths and the path channel state, and further implementing the video transmission of the line-of-sight path and / or the relay path; and if the line-of-sight path and / or therelay path are / is unstable, adopting an SHVC encoder, determining the number of the coding paths of the adaptive multiple description encoder by combining the number of paths and the path channel state, and further implementing the video transmission of two or three of the relay path, the line-of-sight path and a first-order reflection path through Fountain codes. According to the scheme of the invention, the basic video service of a user under harsh network conditions can be guaranteed, and the video quality can be improved as much as possible under relatively stable network conditions.
Owner:NANJING UNIV OF POSTS & TELECOMM

Cold chain equipment monitoring and management system

The invention discloses a cold chain equipment monitoring and management system, and relates to the field of equipment monitoring and management systems. The system comprises a system platform, a Zigbee gateway, a Zigbee routing relay and an equipment terminal. The system platform sets grid cabinet parameters and issues the grid cabinet parameters to the Zigbee gateway through a 5G module; the Zigbee gateway issues the grid cabinet parameters to the Zigbee routing relay through a Zigbee network; the Zigbee routing relay issues the data to the equipment terminal through the Zigbee network; theequipment terminal analyzes the data to execute an operation; after the operation is executed, the equipment terminal submits a feedback to the Zigbee routing relay through the Zigbee network, the Zigbee routing relay transmits the feedback to the Zigbee gateway through the Zigbee network, and the Zigbee gateway submits the data to a server through a 5G network; and the server analyzes the data tocheck the feedback, if the feedback succeeds, the parameter adjustment succeeds, and if the feedback fails, an execution instruction continues to be issued. The monitoring system achieves the purposes of monitoring and managing containers through the combination of a Zigbee ad hoc network and a wide area network, reduces the equipment communication cost, maintains continuous communication, avoidscommunication interruption, and can better supervise equipment.
Owner:AUCMA

Wireless communication system and method for stacker-reclaimer

The invention relates to a wireless communication system and a method for a stacker-reclaimer, and belongs to the field of Ethernet communication. The wireless communication system of the stacker-reclaimer comprises a vehicle-mounted directional antenna which is arranged on the stacker-reclaimer through a vehicle-mounted antenna support, is connected with a vehicle-mounted wireless access point and is accessed to a vehicle-mounted Ethernet through a wired cable or an optical cable; a ground directional antenna which is arranged at the end point of a running track of the stacker-reclaimer through a ground antenna bracket; wherein the vehicle-mounted directional antenna is connected with a ground wireless access point and is accessed to the ground Ethernet through wired connection, the vehicle-mounted directional antenna and the ground directional antenna are oppositely arranged, and a plane center vertical line of the vehicle-mounted directional antenna and a plane center vertical lineof the ground directional antenna are overlapped with a virtual reference line. According to the stacker-reclaimer wireless communication system, the number of involved devices is the smallest, the cost is the lowest, maintenance is the most convenient, and stable and effective transmission of data is achieved.
Owner:BEIJING DEBAI LITAI TECH

Inter-cell switching method, device and equipment and computer readable storage medium

The invention relates to an inter-cell switching method, device and equipment and a computer readable storage medium. According to the invention, the switching request for switching the terminal froma source cell to a target cell is sent to a second control network element through a first control network element in a same base station, and the second control network element sends the data switching indication information to the first control network element. The first control network element sends switching reconfiguration information to the terminal according to a switching request responsefed back by the second control network element, obtains identification information of the terminal, and sends the identification information of the terminal to the second control network element; andwhen the second control network element receives the identification information of the terminal and the reconfiguration completion response of the terminal, resource release indication information issent to the first control network element, so that the switching process of the terminal among different cells of the same base station is realized. The problem of communication interruption of the terminal during inter-cell switching across the same base station is effectively avoided, so that the service quality of the terminal in the inter-cell switching process is improved.
Owner:COMBA TELECOM SYST CHINA LTD

Intelligent electrical appliance control method and device, computer equipment and storage medium

The invention discloses an intelligent electrical appliance control method and device, computer equipment and a storage medium. The method comprises the steps that communication connection is established with other intelligent electrical appliances; control information used for controlling the target intelligent electrical appliance is acquired; and the control information is transmitted to the target intelligent electrical appliance through communication connection. According to the method and the device, the computer equipment and the storage medium, multiple connection links between the control side and the target intelligent electrical appliance can be established on the basis of communication connection established between all the intelligent electrical appliances, and communication connection between the control side and the target intelligent electrical appliance is not influenced even if a certain connection link is disconnected so that the stability of communication can be guaranteed, i.e. the problem of communication interruption between the control side and the target intelligent electrical appliance caused by disconnection of the single connection link between the control side and the target intelligent electrical appliance can be avoided. Any one intelligent electrical appliance can act as the target intelligent electrical appliance and can also act as the relay equipment between the control side and the target intelligent electrical appliance.
Owner:QINGDAO HAIER TECH
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