52results 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 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 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 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 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.

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 the technical field of radio frequency connectors, and discloses a coupling type radio frequency connector which comprises a coaxial shell, an inner conductor, a medium and a coupling radio frequency board which are sequentially connected, a shell through hole is formed in the coaxial shell, a medium through hole is formed in the medium, one end of the inner conductor is inserted into the shell through hole, and the other end of the inner conductor is inserted into the coupling radio frequency board. And the other end of the inner conductor is inserted into the medium through hole. The problem that in the prior art, effective and reliable transmission of radio frequency signals cannot be achieved is solved.