53results about How to "Efficient and reliable transmission" patented technology

There is provided a mechanism for conducting data transmission from a network management entity of communication network control element to a terminal or UE with improved robustness. After a multiflow connection for data units via at least one network transceiver device and via at least two different paths is set up towards a terminal, selection criteria are applied so as to decide which data units are sent on which transmission path. Specifically, dependent on the applied selection criteria, data units of specific data are selected to be subjected either to bicasting each selected data unit using the at least two paths, or to dynamic flow switching so as to transmit each selected data unit using one of the at least two paths and wherein each selected data unit can be in dependently chosen to be transmitted over either of the at least two paths.

The related terminal wireless access method comprises: 1. setting a terminal wireless access capacity table contained all access capacity parameters; 2. storing the access capacity parameters in terminal and decides the subordinate capacity type; 3. providing the access capacity information to a wireless communication network; and 4. deciding ad processing to select the proper access type and configuration. This invention is high efficient and simple.

The invention provides a high-reliability transmission method of messages in a distributed system. The transmission method can provide efficient and reliable message transmission to the distributed system and guarantee the reliability of the message transmission which is memorized into a memory level; meanwhile, the transmission method also can guarantee that the messages lost in a network transmission process can be retransmitted to a receiver in a recovering step after the network is malfunctioned, so that the reliability of the system is guaranteed.

The invention discloses a joint source-channel coding method based on wavelet frame transform. A transmitting end comprises the following steps: 1. after processed by a wavelet frame decomposer, an original image is converted into sub-images with different frequencies; 2. predictive coding is carried out on a low-frequency coefficient matrix, and respectively independent SPIHT compression coding is carried out to three subtree matrixes; 3. a controller classifies compressed code flow according to importance; 4. a channel encoder carries out unequal error protection to different source code flows with different importance levels, and coding output is sent to a wireless channel by parallel / serial conversion and a modulator. A receiving end comprises the following steps: 1. a receipt signal enters a corresponding channel decoder by the parallel / serial conversion and the modulator to finish the channel coding with different code rates; 2. the controller outputs and reconstructs codings to form four parts of code flows which correspond to the low-frequency coefficient matrix and the three subtree matrixes; 3. the four parts of the code flows are respectively decompressed, and a coefficient matrix after initial transform is calculated out; 4. a wavelet frame reconstructing device regains the original image by the coefficient matrix.

The embodiment of the invention provides a data sharing exchange method and system, and the method comprises the steps: extracting the sharing exchange data requested by a user from a source end database according to a sharing exchange request initiated by the user; cleaning and converting the transmitted shared exchange data according to parameter information pre-configured by a user; and sortingthe processed shared exchange data into a resource directory system, and sharing the shared exchange data according to the resource directory of the shared exchange data. According to the embodimentof the invention, data exchange, data sharing and service collaboration among different systems are flexibly realized, the utilization rate of information resources of each system is improved, and efficient and stable sharing exchange of the data resources is ensured.

The invention discloses an audio-video wireless transmission system and a transmission method, wherein, the system comprises a wireless audio-video central station and a wireless audio-video mobile terminal; when the central station and the mobile terminal carry out audio-video wireless transmission by adopting a WLAN transmission channel, the wireless audio-video central station detects the quality of a signal transmitted from the wireless audio-video mobile terminal in real time; when the signal quality is reduced to an early warning value, the two adopt a multicarrier transmission channel, a central station image is synchronously switched to the multicarrier transmission channel; and the WLAN transmission channel keeps monitoring, when the signal quality of the WLAN transmission channel is increased to a preset value, an interface of the WLAN transmission channel is restored, and the multicarrier transmission channel is cut off. The invention organically combines the WLAN and multicarrier proposal together, realizes the full utilization under different source conditions, and reliably realizes the real-time transmission of audio-video and data under the complex environment.

The invention relates to a scalable layered coding based multi-path transmission scheme, which comprises the following steps that: a sink node builds an energy time delay gradient ET and a time delay gradient T for each node; a video sequence is subjected to M-class scalable coding, and a bit rate of each layer after coding is ...., (wherein <K2 <...<), different marks are set for a basic layer and enhancement layers, P represents a channel bandwidth, if, then the base layer is transmitted only; if (1<q<M), then first q bitstream layers are transmitted, if, then M bitstream layers are transmitted; a first data packet in the bitstream layer to be transmitted is selected to be used as a detection data packet to be sent to the sink node; the sink node receives the detection data packet to carry out reverse path enhancement; and the subsequent bitstream layers select paths that the data packets with the same mark value pass to be used as transmission paths to send the data to the sink node. By using the scheme provided by the invention, the change in network bandwidth can be adapted, and the business requirements of different bandwidth users can be met.

The invention discloses a three-machine three-strand slab continuous casting machine production line which is specially matched with the rapid smelting period of a large converter. Three water outlets are formed in the bottom of an intermediate tank of the production line. A one-strand slab continuous casting machine is correspondingly arranged on the lower portion of each water outlet. The two sides, in the inner and outer arc direction, of each vibration device are each provided with a vibration oil cylinder and leaf springs, wherein the two vibration oil cylinders are set to be the same in motion stroke, and the leaf springs are set to be the same in mounting angle. All loads of the vibration devices are transmitted to a secondary cooling chamber concrete wall through vibration supporting structures. Sector segment transmission devices of the casting machines on the left side and the right side are arranged outside the secondary cooling chamber concrete wall, and motors and speed reducers are directly connected with drive rollers of horizontal sector segments through couplers. A transmission device of the middle slab continuous casting machine is a suspended transmission device. Productivity can be obviously increased, existing two-strand continuous casting machines can be conveniently modified into three-machine three-strand continuous casting machines, the process layout is compact, and the economic performance is excellent.

The invention discloses signaling transmission method for OBSAI RP3 interface comprising: a, source node maps the signaling into OBSAI data stream by HDLC frame style; b, transmission layer of source node routes the OBSAI data stream to target node according to target address of OBSAI data stream; c, target node extracts signaling information from the OBSAI data stream. In the invention, signaling transmission is performed by HDLC mode; transmission layer can route the signaling frame to target node according to address field, thereby largely reducing realization difficulty or complexity of hardware, implementing reliable and highly effective transmission for signaling, shortening development period and reducing development cost.

The present invention relates to a data exchange network, in particular to an encapsulation method of network link layer frames. Aimed at the defect of the inadaptation to the IP telecom network data encapsulation in the prior art, the present invention provides a new frame structure and utilizes the frame structure to realize the link layer function of an IP telecom network. The present invention applies an encapsulation method of IP telecom network data frames and is divided into three steps. Firstly, an identification field and a type field are set in the frame head field; secondly, the identification field defines the transmission pattern of the frame; and thirdly, the type field defines the information type of the frame. Adapting to different circuits, the present invention has the advantages of achievement of the purpose of reliability, high efficiency and convenient realization on the equipment, good expansibility, convenient realization of the bearing and processing of various data packages, realization of the transmission function of the link layer on various point-to-point physical channels and completion of the link control function and the transmission of various upper-layer package switching.

The invention discloses a bit stream transmission method combing SPIHT (set partitioning in hierarchical trees) compression and unequal error protection coding. The method comprises the following steps of: at a transmitting end, dividing SPIHT bit stream into three types of LSP (unimportant subset set), LIP (unimportant pixel set) and LIS (important coefficient set), extracting and packing various bit streams according to a threshold value in turn, and protecting the channel coding bit rate output by a bit rate optimization algorithm according to the type, wherein five steps are implemented in the transmitting end; and implementing four steps at a receiving end, wherein the method receives effective decoding bit stream as much as possible according to the SPIHT decoding characteristics). Therefore, according to the scheme, the method keeps the embedded property of the SPIHT bit stream, realizes optimization of the bit rate and fully considers the property of the SPIHT bit stream during decoding. The method has good practical value and broad application prospect in the technical field of wireless communication.

The invention provides an operation data acquisition method and an operation data acquisition system for trains. The method includes by a data gateway, acquiring a data packet from an acquisition terminal, and sending the data packet to message queue middleware; by the message queue middleware, extracting identification codes of the acquisition terminal from the data packet, and storing operationdata in the data packet into message queues corresponding to the identification codes, wherein the different identification codes correspond to the different message queues; when the operation data are data focused by a data center, sending the operation data to the data center by the message queue middleware. An efficient and reliable message transmission mechanism of the message queue middlewarecan be utilized in the method, the operation data can be efficiently and reliably transmitted to the data center, and the data integrity is guaranteed. In addition, the data center only receives thedata of its own interest, so that the data processing efficiency of the data center is improved, and the system reliability is ensured.

The present invention discloses a data transmission control method. The method comprises the following steps: when a receiver monitors an escape character on a transmission channel, determining whether a character immediately following the escape character is a starting character; when it is determined that the character immediately following the escape character is the starting character, receiving frame information after the starting character; when it is determined that the frame information transmission is ended, determining whether frame data formed by the frame information are correctlyreceived, wherein when it is determined that the frame data are correctly received, returning confirmation receipt information to a sender. The invention further discloses a data transmission controlapparatus and a computer readable storage medium. By adoption of the data transmission control method, minimization of frame data bytes of data transmission is achieved while ensuring complete transmission of data by setting a structure of simple and complete frame data, and by using such a simple frame structure, simultaneous ensure efficient and reliable transmission of data can be ensured at the same time.

The invention provides a narrowband ad hoc network communication control method and related equipment, and the method comprises the steps: receiving a service signal transmitted by an uplink time slot of an uplink carrier frequency point by transit equipment, and synchronizing the service signal according to a frequency point time slot synchronization rule configured for synchronizing a synchronization frame type of the service signal; and determining a downlink wave frequency point, a downlink time slot different from the uplink time slot and a TDMA frame synchronization pattern, thereby realizing framing forwarding of the service signal, i.e., multiple times of synchronous forwarding of the service signal through different time slots at the same or different carrier frequency points, so as to fully utilize the time slot resource of each carrier frequency point and improve the transmission efficiency of the service signal. According to the method and the device, the transmitted target synchronization frame is ensured to carry the time slot information in the CACH, reliable and efficient transmission of service signals is realized, communication standards do not need to be adjusted, equipment produced by manufacturers can be ensured to be intercommunicated and compatible, and the reliability and the convenience of narrowband ad hoc network communication are improved.

The invention discloses a method and a device for controlling signaling traffic. A sending end is provided with a first signaling buffer unit and a second signaling buffer unit, and a receiving end isprovided with a third signaling buffer unit. During signaling transmission, the method comprises that: when sending the upper signaling, the sending end judges states of the first signaling buffer unit and the second signaling buffer unit, writes the upper signaling into the first signaling buffer unit when the first signaling buffer unit is not blocked, takes data out from the first signaling buffer unit to carry out coding when the second signaling buffer unit is not blocked, then writes the coded data into the second signaling buffer unit, and sends the data in the second signaling bufferunit to the receiving end through an interface protocol; and the receiving end decodes the received data and then writes the decoded data into the third signaling buffer unit, and takes the upper signaling out from the third signaling buffer unit by frame. By adopting synchronous coordinate work of a plurality of buffer areas, the method and the device solve the technical defect of signaling interaction between the prior BBU and the RRU, and ensure efficient and reliable transmission of the signaling.

The invention discloses an amplitude modulation band digital audio broadcasting signal generation method and system. The method comprises the following steps: performing channel coding, bit interleaving and constellation processing on main service information containing paths of service data, system information containing encoding modulation mode and frequency spectrum mode information, and service description information containing description and illustration of the service data, and performing OFDM modulation with disperse radio frequency; inserting the adjusted signal in a beacon, and generating a logic frame, performing frame allocation on the logic frame to generate a physical layer signal frame, and performing conversion from a base band to the radio frequency to generate an amplitude modulation band digital audio broadcasting signal. The system adopts the LDPC channel coding, and processes the signal through interleaving, logical frame allocation and so on, so that the anti-interference performance of the system can be effectively improved.

The invention discloses a system and method for multi-buffering non-constant-speed code transmission of real-time service in intensive communication. The system comprises a coding terminal, at least two communication links and a decoding terminal, wherein the coding terminal sequentially conducts LT code coding on a plurality of information groups formed by dividing a video streaming so that a plurality of groups of multi-buffing LT codes can be obtained, and the obtained multi-buffering LT codes are sent by the coding terminal; the decoding terminal conducts LT code decoding on all the groups of multiple-buffering LT codes which are received accumulatively, so that corresponding information groups are obtained, and corresponding decoding buffering zones are emptied; when one communication link breaks down, other communication links are adopted to conduct data transmission through switching or other communication links and the communication link which breaks down are selected to conduct data communication at the same time. According to the system for multi-buffering non-constant-speed code transmission of the real-time service in intensive communication, when feedback links are not ideal in intensive communication, for example, the delay of one feedback link is long or the upstream link and the downstream link do not correspond to each other, real-time data can be transmitted efficiently and reliably; due to the feature of the non-constant speed codes, switching between the communication links is smoother.

The invention relates to a direct-current leakage current test device. The direct-current leakage current test device comprises a data acquisition terminal and a visual terminal, wherein the data acquisition terminal is connected with an insulating test product, samples the direct-current leakage current and sends out a remote signal containing the direct-current leakage current information; the visual terminal communicates with the data acquisition terminal, receives and analyzes the remote signal and then displays the direct-current leakage current information. The data acquisition terminalcomprises a current sampling module and a signal emitting module for emitting the remote signal; the visual module comprises a signal receiving module for receiving the remote signal, a signal processing module and a display module. The signal emitting module is an infrared emitting module for emitting an infrared signal; the signal receiving module is an infrared receiving module for receiving the infrared signal. Test data can be transmitted and read efficiently and reliably under the condition that the safe distance of test pressurizing is reached; an operator can control the pressurizing time conveniently, the life damage caused by long-time pressurizing of the insulating test product is reduced, and the test efficiency is improved.

The invention provides a computer docking station and a switching working method thereof; the switching working method comprises the following steps: monitoring whether a wired input module is connected with a computer host machine and outputting the monitoring result; controlling a first data processing module to be connected with the wired input module when the wired input module is connected with the computer host machine, which is indicated by the monitoring result; and controlling the first data processing module to be connected with the wireless input module when the wired input module is not connected with the computer host machine, which is indicated by the monitoring result. According to the invention, the computer host machine is provided with expansion interfaces by a wireless way and a wired way.

An engine includes a compression chamber that intakes and compresses working fluid; an expansion chamber that expands and exhausts working fluid; and a transfer chamber that receives working fluid from the compression chamber and transfers working fluid to the expansion chamber, wherein an internal volume of the transfer chamber decreases during the transfer of working fluid.

The invention discloses a photoelectric network transformer substation which comprises an energy unit, an information unit and a sensing unit. The energy unit is used for energy flow transmission andis also used for transmission and / or conversion and / or control of electric energy or light energy; the information unit is used for generating and / or transmitting an information flow, and is also usedfor transmitting communication information and exchanging data; and the sensing unit comprises a photoelectric network sensor and is used for generating and / or transmitting a sensing signal, generating a sensing flow, sensing and monitoring equipment in the photoelectric network transformer substation, sensing and monitoring an energy cable, and sensing and / or monitoring equipment connected withthe energy cable. In the invention, one-network transmission of the energy flow, an information flow and a sensing flow is effectively realized, real-time on-line monitoring of operation states of internal and external equipment and energy cable lines of a photoelectric network is realized, and consumption of manpower and material resources is reduced; in addition, an independent and safe privatenetwork can be provided for a user so as to meet strict requirements of the user for information communication safety, and usability is high.

The invention relates to the technical field of hydrological monitoring stations, and discloses an edge intelligence-based hydrological monitoring station image recognition monitoring system, which comprises an intelligent camera, an edge node, a macro base station, an intelligent mobile terminal, a cloud center and a visualization center, and is characterized in that the output end of the intelligent camera is electrically connected with the input end of the edge node; the output end of the edge node is electrically connected with the input end of the macro base station, the output end of the macro base station is electrically connected with the input end of the cloud center, and the output end of the cloud center is electrically connected with the input end of the visualization center; and the output end of the macro base station is electrically connected with the intelligent mobile terminal. According to the hydrological monitoring station operation management target, the hydrological monitoring station intelligent operation management quality evaluation standard and the monitoring evaluation technical standard are researched and formulated, so that a unified hydrological monitoring station operation management monitoring evaluation system is established, and the effect of convenient monitoring is achieved.

One or more embodiments of the present specification provide a DCCP-based congestion control method and system, and an electronic device, which can ensure high efficiency and fairness of data traffictransmission in a wireless sensor network. The method comprises the following steps: enabling a receiving end to cache a received data packet; returning receiving confirmation information to the sending end when the data packet is received; after the data packet is received, detecting and duplicate checking are carried out on the data packet; and enabling the sending end to control the data packetsending rate according to the receiving confirmation information in allusion to different network operation states. The system comprises a sending module and a receiving module. The electronic deviceincludes a memory, a processor, and a computer program stored on the memory and operable on the processor to implement the congestion control method.

The invention relates to an RTK transmission system and method based on a V2X networking technology, and the system comprises: an RTK differential data transmitting end which is connected with a V2X local area networking communication device and an RTK differential data receiving end, and is used for configuring a built-in first V2X communication module and an RTK processing module according to preset parameters, building a V2X communication network for RTK data collection, and processing and sending the RTK data according to a preset rule; a V2X local area network communication device which is used for controlling data forwarding of RTK data among different nodes; and a RTK differential data receiving end which is used for analyzing and processing the RTK data to obtain original RTK data corresponding to the current RTK data, and transmitting the original RTK data. According to the invention, RTK data multi-link efficient and reliable transmission is realized, and accurate positioning is ensured.

The invention relates to a path allocation method and system. The path allocation method comprises the steps of mutually establishing a plurality of IP paths between base stations and core networks, and locally generating mutually matching base station side configuration tables and core network side configuration tables in the base stations and the core networks, wherein the base station side configuration tables and the core network side configuration tables comprise path allocation information, and the path allocation information is used for indicating the plurality of IP paths to transmit messages in a master and slave mode or a load sharing mode and switch mutually and freely. According to the method and the system, the IP paths capable of effectively and reliably transmitting the messages between the base stations and the core networks are provided for users, and the problem of call drop and traffic disconnection between the base stations and the core networks resulting from the user plane routing problem can be effectively solved.