1569 results about "Reliable transmission" patented technology

A composite instrument is provided comprising a first functional instrument and a second functional instrument when the first functional instrument is coupled with the second functional instrument. A composite handle for the composite instrument is provided comprising a first handle and a second handle when the first handle is coupled with the second handle. The handle makes possible the reliable transmission, with increased mechanical advantage, of both torsional and longitudinal loads by the physician to the composite instrument, while resisting relative rotation between the first and second instruments. The instrument is sterilization sensitive, changing physical appearance after sterilization.

A method is disclosed for carrying out network device provisioning and configuration, and communication of other information to a network device, automatically and in an assured manner. A configuration service receives a request from a network device to provide configuration information. The configuration service retrieves a template representing the configuration from a storage location, e.g., a directory service. The configuration service also retrieves one or more parameter values specific to the device. Device-specific values are instantiated for the generic parameters in the template, based on the retrieved values. The resulting configuration is stored in XML format using XML tags to delimit configuration commands, tested for well-formed-ness, and syntax checked. A reliable transport protocol carries the configuration information to the device. At the device, a configuration agent syntax checks the embedded configuration information, and then applies the configuration information to the device. As a result, automatic network provisioning may be accomplished remotely, without requiring a skilled technician to visit customer premises to carry out configuration. The process may be integrated with an event service to enable multiple devices to concurrently receive re-configuration without special synchronization logic.

Interactive content preservation and customization technology is placed at the broadcast facility to ensure reliable transmission of the interactive content to a local subsystem. An interactive content code detector detects interactive content codes in the video stream at the broadcast facility. The interactive content code detector is placed in the transmission path before the video stream is transmitted to broadcast facility hardware that may strip out, destroy, corrupt or otherwise modify the interactive content and interactive content codes. Once an interactive content code detector detects a code, an interactive broadcast server determines what action to take, and instructs an data insertion unit accordingly. The interactive content codes or interactive content may be placed in a portion of the video that is guaranteed by the broadcast facility to be transmitted, for example, the closed caption region of the vertical blanking interval.

The aim of the present invention is to provide an efficient and reliable transmission/reception mechanisms for a communication system with multiple component carriers, each of which further includes physical resources such as transmission slot/symbol, subcarrier/frequency subband, code, or radiation pattern. Accordingly, the control signal of a component carrier comprises a scheduling assignment specifying for said component carrier a resource for transmission of a data signal, and an allocation map specifying that a scheduling assignment has been sent for another component carrier. Signalizing the allocation map enables detection of possibly missed scheduling assignments.

A communication node of the present invention automatically transmits original and duplicate packets over different paths in a communications network to improve delivery reliability of the packet and to decrease packet delivery time. A packet is typically marked for reliable transmission by the application layer of a source node, while a routing agent module within the node IP layer processes the marked packets. The marked packets are transmitted over redundant (e.g., primary and secondary) network paths from the source node to the destination node. The primary path is usually the shortest path between the source and destination nodes, while the secondary path is selected to avoid overlap with the primary path. The application or transport layer of the destination node filters or removes plural copies of received packets.

A communication system such as an OFDM or DMT system has nodes which are allowed to transmit continuously on one or just a few of the system's frequency sub-channels, while the other nodes avoid putting any signal into those sub-channels. Simple low data rate nodes are allowed to use a small number of sub-channels while more complicated nodes use the remainder. A control protocol allows the sharing in time of communications using overlaid and non-overlaid multi-carrier communication techniques. The sharing in time can be done using TDMA, CSMA or polling techniques. In each case, mechanisms are provided for bringing new nodes into the network and for insuring the time alignment of overlaid transmissions. Reliable transmissions are insured through acknowledgement and retransmission facilities.

The invention relates to a unidirectional reliable transmission method and a transceiving device based on data packages, belonging to the field of computer networks. In the method, a transmitting end firstly segments an information data block into data package sequences, classifies the data packages, covers erasure correcting codes and carries out coding to generate a redundancy packet covered by each subcode, then carries out cyclic redundancy code (CRC) coding on each data package, finishes the packaging of the data packages, carries out forward error correction (FEC) coding inside the packages on all data packages and finally transmits data into a receiving end; and the receiving end firstly carries out caching on data packages, FEC decoding inside the packages on all data, sequencing on the data packages and verifying by CRC codes, judges whether the data packages lose or not by detecting package numbers and carries out package loss recovery if information data packages lose. The invention solves the technical field of not being capable of carrying out self-checking and error self-correction based on data package transmission under a unidirectional channel and can correct in-packet information errors inside the packages and recover continuous package loss.

Methods and systems of low density parity check coded (LDPCC) coding are disclosed herein in which a set of LDPC codes ensure reliable transmission for channels in which modulation symbols may undergo attenuation in a random fashion. Methods and systems of LDPC coding disclosed herein include choosing a code blocklength and concatenating codewords into which a data packet can be encoded. To optimize the coding scheme, first, codeword shortening is performed to ensure an integer number of codewords for a desired packet length. The codewords may then be punctured or repeated to ensure an integer number of channel symbols per codeword. Shortening and puncturing repetition methods are implemented to yield minimum overhead while keeping the effective coding rate low.

Disclosed are methods for sending and receiving ACK/NACK information, a base station, and a terminal. The method for sending ACK/NACK information comprises: dividing acknowledgement (ACK)/negative acknowledgement (NACK) information of multiple terminals into X groups according to a present indication parameter, X being a positive integer greater than or equal to 1; separately performing combined coding on ACK/NACK information corresponding to each group in the foregoing X groups, so as to obtain X first blocks of bits; and mapping the foregoing X first blocks of bits to a predetermined ACK/NACK physical source and sending the foregoing X first blocks of bits. By means of the present invention, reliable transmission of HARQ-ACK information of a terminal on the NCT is implemented, the reliability of transmission of uplink data in a Low Cost terminal is improved, and problems such as a conflict of PHICH resource allocation and ICIC of a frequency domain in a small cell are solved.

The invention provides a method of data reliable transmission with a user datagram protocol (UDP) in a communication network. The method comprises that firstly, connecting handshake is carried out between a data packet sending end and a data packet receiving end, a communication layer of the data packet sending end informs an application layer that a reliable transmission channel is built; in a data packet transmission process, the communication layer of the data packet sending end detects a channel state of the transmission channel through a heartbeat mechanism, and if the channel state changes, the application layer is informed. The method has strong adaptability and can be used for the communication network which is large in transmission delay difference. A mutual-informing mode is used between the application layer and the communication layer of the sending end, the application layer and the communication layer are in mutual independence and also a unified whole, data reliable transmission is achieved, and meanwhile the problem that when the transmission channel is in fault, the uninformed application layer sends data to the communication layer continuously and resources are consumed is avoided. According to the method, the communication layer of the receiving end transmits a data packet to the application layer directly according to protocol header information to activate task scheduling, and the method has more advantages than a polling scheduling strategy and a callback scheduling strategy.

The invention discloses a compact quick-change mechanism of a robot for minimally invasive surgery. The compact quick-change mechanism is composed a quick-change box and a quick-change base, and mainly comprises four groups of transmission mechanisms, a limiting and locking mechanism, a driving system and the like, wherein the connecting part of the quick-change box is connected with the tail end of an instrument with a wrist function through a rotating axis, and the quick-change box can quickly slide along a concave chute of the quick-change base, thereby realizing replacement of surgical instruments; the quick-change box sliding into the quick-change base is limited and fixed by the limiting and locking mechanism installed at the tail end of the quick-change base; the four groups of transmission mechanisms are in similar structures, and finally realize four degrees of freedom of the tail end of the instrument in a wire transmission mode respectively by a servomotor; a transmission steel wire can be fixed and tensioned by a wire fixing wheel assembly in each transmission mechanism; and the driving system is composed of a servomotor and a harmonic speed reducer, and is fixed on the base frame of the quick-change base through threaded connection. The compact quick-change mechanism disclosed by the invention has the advantages of compact structure, light weight, reliable transmission, high quick-change efficiency and the like.

The invention discloses an intelligent skynet application platform. Layered architecture is adopted by the intelligent skynet application platform, and standard general protocols and interfaces are used among layers. The intelligent skynet application platform comprises a collecting layer, a transmission layer, a core ability layer, an application layer and a client. The collecting layer is used for collecting videos, audios, pictures, data and alarms. The transmission layer provides high-quality physical transmission channels for all kinds of data flows and guarantees safe and reliable transmission of the data flows. The core ability layer achieves data access, data processing, system management and data interaction. A plurality of system management ability modules such as a data base module, a management service module, an intelligent analysis module, a streaming media distributing module, a comprehensive assessment module and an alarm and positioning module are arranged in the system, cooperatively work, and can automatically conduct processes such as data access, data processing, system management and data interaction so as to achieve automatic and intelligent monitoring. The intelligent skynet application platform can be combined with GIS or PGIS positioning so as to achieve fast positioning of an event.

The invention relates to a dynamic self-organizing hierarchical routing method. The method is applied to the tree topology structure of a wireless sensor network, the problems of path failure and data transmission incapability due to node mobility or failure are solved, and the topology structure of the network can be dynamically regulated. The network is established by adopting a multi-branch-tree-based topology structure, and each node maintains a routing table of one level, and records a sub-tree topology structure taking the node as a root. The routing table is effectively updated by inserting a sequence number during node access application, so that the problems of repeated node numbers in the routing table of upper-level nodes are solved. Only when data cannot be transmitted, the routing tables reorganize the topology structures, and timely maintain the topology structures in the network, so that energy overhead, computing overhead and data transmission real-time performance are combined, the reliable transmission of the data is ensured, the overhead is reduced, and the advantages of a routing protocol and a routed protocol are utilized.

The invention relates to an underwater communication system. The underwater communication system comprises a sensor, a transmitting sub-system and a receiving sub-system, wherein the sensor is used for sensing an external environment, and assisting an underwater wireless communication node in automatically selecting a proper communication mode and a corresponding modulation-demodulation mode; the transmitting sub-system consists of an encoding unit, an adaptive modulation unit and an transmitting unit; the transmitting sub-system is used for transmitting a signal to be transmitted to a corresponding channel of the transmitting unit after the signal is encoded by the encoding unit and demodulated by the adaptive modulation unit, and converting an electric signal into an acoustic signal or an optical signal to transmit the acoustic signal or the optical signal; the receiving sub-system consists of a receiving unit, an adaptive demodulation unit and a decoding unit; and after a corresponding channel of the receiving unit receives the acoustic signal or the optical signal and converts the acoustic signal or the optical signal into the electric signal, the electric signal is demodulated by the adaptive demodulation unit, and an original signal is demodulated by a decoder of the decoding unit lastly. Through adoption of the underwater communication system, reliable transmission of data or instructions within a communication network range is realized.

The invention relates to a reliable transmission acceleration method facing networks with high error rate and long delay characteristics, belonging to a reliable end-to-end transmission method of internet. In the invention, reasons that the network loses packages are distinguished according to the following method on the basis of a FAST TCP protocol: when a sending end receives 3 repeated ACK packages, the difference value of the transmission speed of a previous RTT and the transmission speed of a present RTT can be determined, when the transmission speed of the present RTT is larger than thetransmission speed of the previous RTT, the network does not have congestion, and the reason for losing package is link error; and when the transmission speed of the present RTT is greatly smaller than the transmission speed of the previous RTT, then the network can have congestion, and the package loss can be determined to be caused by network congestion. Calculated RTT can accurately and timelyreflect the current network status through the invention, thereby the reflection sensitivity of a congestion window of the sending end to the network status can be enhanced.

The embodiment of the invention provides a method and a device for data file transmission and relates to the technical field of communication. The method comprises the following steps: a receiving end creates at least two downloading threads and starts all the downloading threads to carry out concurrent downloading, and each of the downloading threads independently downloads block data in a corresponding task queue from the receiving end and writes the downloaded block data into a buffer queue; the receiving end simultaneously starts a parallel single thread, and the parallel single thread sequentially acquires block data which is numbered i in the buffer queue and carries out orderly-iterative data integrity verification on the block data which is numbered i to obtain a data integrity verification value after orderly combination of the block data which is numbered i and all the previous block data; and the receiving end writes the block data which is numbered i into a target file. According to the embodiment of the invention, the transmission speed for a single large data file is improved, the reliable transmission time for a single large data file is shortened, and the network bandwidth utilization rate is improved.

A system, method and program product for diagnosing, controlling and collecting information from devices. Information regarding events of each one of a plurality of target applications executing in an application unit is collected and formatted into one of multiple data formats for transmission through one of multiple communication protocols at the request of each of the target applications, through an interface. A combination of a data format and communication protocol requested by a target application is verified for validity. If the requested combination is invalid, a valid combination is substituted for more reliable transmission. The formatted data is transmitted through, e.g., e-mail or FTP to a predetermined destination or may be saved to local storage, e.g., a local disk. By sharing resources, code duplication is reduced or eliminated.

The invention relates to a three-screw planetary transmission vertical medium stirring mill, and belongs to the field of ore dressing and grinding fragmentation. The three-screw planetary transmission vertical medium stirring mill comprises a motor, a motor support, an outer tooth ring, a plant rack, a gear box, a shaft coupling I, a material outlet, a cylindrical shell, stirrers, a material return tube, a cylindrical shell liner plate, a material inlet tube, a roller needle, a planetary gear, a sun gear, a short shaft and a shaft coupling II. The three helical stirrers are ingeniously combined with planetary transmission, and the advantages of the planetary transmission are fully used to make a transmission structure compact, greatly improve the transmission efficiency and the power density and realize a direct deceleration effect; and the revolution and rotation motion of the three helical stirs increases the motion complexity of materials in the cylindrical shell and effectively reduces the central dead zone phenomenon induced by material centrifugation, so the effective grinding area in the mill is increased. The three-screw planetary transmission vertical medium stirring mill has the advantages of superior grinding mechanism, reliable transmission, compact structure, low energy consumption, high efficiency, small occupied area, wide application range, and simple and convenient use and maintenance.