739results about How to "Reduce time delay" patented technology

The present invention is primarily directed a prosthetic cardiac valve support device adapted for endovascular delivery to a cardiac valve, comprising a single ring-shaped support element having an inner diameter and an outer diameter, wherein said support element has an outer perimeter that is entirely rigid, wherein said support element is fitted with one or more intra-ventricular and / or intra-atrial stabilizing elements, and wherein said support element has a collapsed delivery configuration and a deployed configuration.

Methods and apparatus for a gate-length biasing methodology for optimizing integrated digital circuits are described. The gate-length biasing methodology replaces a nominal gate-length of a transistor with a biased gate-length, where the biased gate-length includes a bias length that is small compared to the nominal gate-length. In an exemplary embodiment, the bias length is less than 10% of the nominal gate-length.

The invention discloses a joint cloud computing environment value exchange-oriented cross-chain communication method, and aims to ensure the security, reliability and high efficiency of a value exchange process. According to the technical scheme, a cross-chain communication system consisting of a cross-chain communication module, a node management module, a verification module and an accounting module is installed in each user node on each block chain; a midchain is established; a route node is selected from the midchain; value transfer and communication between chains are finished by the route node; the cross-chain communication module of a sender constructs a fund pool for the sender, a receiver and the route node, and performs fund transfer according to a fund transfer scheme; the verification module of the receiver verifies the effectiveness and availability of funds of the sender by adopting a smart contract; the accounting module of the receiver broadcasts a transaction result; and the sender, the receiver and the MidChain generate new blocks for storing transaction data. By adopting the method, the security, reliability and high efficiency of the value exchange process can be ensured; and seamless cross-chain communication between the chains is realized.

The invention discloses a traffic flow running rate recognizing method based on bus GPS data and relates to a traffic information collecting and processing technology in the field of intelligent traffics. The method comprises the following solving steps of: carrying out grade division on an urban road section by a GIS; confirming a speed threshold value K1 and a speed threshold value K2 of all grades of roads; carrying out sub-road section division on the urban roads by the GIS; obtaining an average value of the speed that all buses pass through a sub-road section in a certain time interval, which is collected by a bus vehicle-mounted GPS system; comparing the average value of the speed with the threshold value K1 and the threshold value K2 of the sub-road section and confirming the traffic flow running rate of the sub-road section. The traffic flow running rate recognizing method based on bus GPS data can obviously improve the recognizing precision of the traffic flow running rate, reduce the time delay and provide the type of traffic jam simultaneously, thereby providing a basis for selecting more convenient traveling line for a traveler and proving more powerful decision support for establishing a jam facilitating scheme for a traffic management department.

The disclosed embodiments disclose techniques for synchronizing file updates between two cloud controllers of a distributed filesystem. Two or more cloud controllers collectively manage distributed filesystem data that is stored in the cloud storage systems; the cloud controllers ensure data consistency for the stored data, and each cloud controller caches portions of the distributed filesystem. During operation, a cloud controller receives a request from a client to access a file in the distributed filesystem. The cloud controller sends a synchronization update request for the file to a second cloud controller and in response receives a synchronization update for the file from the second cloud controller.

Disclosed is a system for providing handover of a mobile node in a wireless network supporting Mobile IP (Internet Protocol). The mobile node sends, when handover is needed, a request for neighbor access router information to a first access router currently communicating with the mobile node, and selects, if the neighbor access router information is received, a second access router serving as a target access router using the received neighbor access router information. The first access router exchanges access router information with a neighbor access router, provides neighbor access router information to the mobile node upon receiving the neighbor access router information request from the mobile node, and redirects data to be delivered to the mobile node to the second access router to which the mobile node will be handed over. The second access router forwards data to be delivered to the mobile node, received from the first access router, to the corresponding mobile node.

This application relates to an apparatus and a method for equalizing chromatic dispersion and a digital coherent optical receiver. The apparatus for equalizing chromatic dispersion comprising: a chromatic dispersion equalizing unit, for compensating chromatic dispersion of an input signal; and an additional time delay removing unit, for removing, in accordance with frequency offset of the input signal, chromatic dispersion equalization time delay generated by the chromatic dispersion equalizing unit.

A method and an apparatus are provided that transmit and receive a random access preamble in a wireless communication system. A plurality of random access parameters having different values in accordance with a plurality of events for triggering random access are set. When one of the plurality of events for triggering random access has occurred, random access is performed according to at least one of the plurality of random access parameters corresponding to the event. Therefore, the time delay of random access can be reduced.

Improved capabilities are described for increasing the bandwidth in a wireless communication network, such as where local optimization servers and centralized optimization servers are connected to a communication network, and wherein at least one wireless RF access node comprises a scheduler for providing uplink and downlink air interface access to the plurality of mobile devices that access the at least one wireless RF access node. The local optimization server may include an application priority service that interfaces with the scheduler to convey to the scheduler an air interface data rate priority value that is assigned to a first mobile device, wherein the scheduler provides uplink and downlink air interface access to the first mobile device based at least in part on the air interface data rate priority value. A topic carried in each data packet that traverses a publish-subscribe broker network may be used by first and the second publish-subscribe broker communication facilities to determine how to route each data packet, and the topic may also be used to identify the application associated with the data packet and to determine the data rate priority value corresponding to the identified application.

Techniques are provided for detecting and evaluating ventricular dyssynchrony based on morphological features of the T-wave and for controlling therapy in response thereto. For example, the number of peaks in the T-wave, the area under the peaks, the number of points of inflection, and the slope of the T-wave can be used to detect ventricular dyssynchrony and evaluate its severity. As ventricular dyssynchrony often arises due to heart failure, the degree of dyssynchrony may also be used as a proxy for tracking the progression of heart failure. Pacing therapy is automatically and adaptively adjusted based on the degree of ventricular dyssynchrony so as to reduce the dyssynchrony and thereby improve cardiac function.

A method of requesting a radio resource in a wireless communication system is provided. The method comprises setting a timer's expiry time, transmitting a radio resource request message to a base station, starting the timer and retransmitting the radio resource request message to the base station if a radio resource allocation message is not received until the timer expires, wherein the expiry time may be set variably based on a communication state.

Disclosed is a method for setting up a route path between a source node and a destination node through route discovery in a mobile ad hoc network. The source node transmits a RREQ message to the destination node, and the destination node transmits a RREP message to the source node in response to the RREQ. A first intermediate node having failed to transmit the original RREP stores the original RREP, generates a PRREQ message, and transmits the generated PRREQ to neighbor intermediate nodes. If an ID of the PRREQ and an original IP address included in the received PRREQ are identical to an ID and an original IP address of the RREQ received from the source node, a second intermediate node receiving the PRREQ generates a PRREP message corresponding to the PRREQ and transmits the PRREP to the first intermediate node. If a partial route path is set up between the first intermediate node and the second intermediate node as the first intermediate node receives the PRREP, the first intermediate node transmits the original RREP via the partial route path. Then the source node receives the original RREP, and completes setup of the route path.

A system for linearizing the output of a high power amplifier (HPA) designed to transmit an RF modulated signal includes in its transmit section a digital up-converter for processing baseband input signals and generating a desired digital RF waveform, T(s). The desired digital RF waveform T(s) is then fed to a digital predistorter circuit for producing a predistorted digital RF waveform P(s)T(s) which, as modified, may be applied via a high sampling speed high linearity digital to analog converter to the high power amplifier (HPA) to produce an output signal which is a linear function of the baseband input signal. The digital predistorter circuit may be of the adaptive type or of the predictive type. Circuits embodying the invention may include encoding circuitry for converting multi-bit signals to a serial stream of single-bit pulses for enabling simplification in the digital to analog conversion. In accordance with the invention, corrections for non-linearity of the HPA may be made directly on the RF waveform using ultra-high speed superconducting electronics (SCE) and decreasing the time delay between sensing a transmitted signal and generating a correcting (linearizing) signal.

A multicast service processing method and access equipment are disclosed. The method includes: receiving multicast program request message from terminal device, inquiring about program rating parameters according to said multicast program request message, wherein the program rating parameter includes multicast group IP address and multicast program rated priority, generating multicast program data according to the program rating parameters, sending the multicast program data to the terminal device.

In embodiments of the present disclosure improved capabilities are described for increasing the bandwidth in a large area broadband LTE wireless network, where regional optimization servers are incorporated near the wireless network in association with the public data network gateway, thus reducing the time-latency for applications being run from a mobile cellular device. Further, by associating additional optimization servers at base stations, application functionality may be optionally transferred from the regional optimization server to the local base station optimization server in instances where a number of mobile cellular devices are requesting the same data via their access through the same cell, and in other instances, to the effect that back haul network bandwidth utilization is reduced or eliminated.

Active noise reduction headphones for audiometry where the earphone portion of said headphones has a cavity volume greater than 6 cc and including an acoustic-electric sensing means and an electro-acoustic transducing means which are used cooperatively and which has additional passive noise control means in the form of a circumaural seal around the ear for improving high frequency noise control performance, the headphone having a summing junction for combining the active noise reduction signal and an audiometry test signal.

In a relay based wireless communication system, a method for transmitting an uplink backhaul of a relay node includes obtaining scheduling information for an uplink backhaul sub-frame through a downlink backhaul control channel from a base station, and performing a rate matching and mapping of data by regarding at least one predefined symbol as a blank symbol. The predefined symbol is located at a front part or a rear part of the scheduled uplink backhaul sub-frame. The transmitting method further includes performing a multiplexing of the uplink backhaul sub-frame, and transmitting the multiplexed uplink backhaul sub-frame. This method can eliminate an overlap of transmission and reception timing in a relay node due to an RF transmission / reception switching time delay. Also, the method can make better use of wireless backhaul resources and minimize an influence on conventional systems by offering the compatibility with conventional uplink and downlink sub-frame structures.

The intelligent system for autonomous spacecraft operations includes an on-board Autonomous Operations subsystem integrated with an on-ground Web-based Remote Intelligent Monitor System (RIMS) providing interface between on-ground users and the autonomous operations intelligent system. The on-board Autonomous Operation subsystem includes an On-Orbit Checkout Engine (OOCE) unit and an Autonomous Tasking Engine (ATE) unit. Spacecraft Command Language (SCL) engine underlies the operations of the OOCE, ATE and RIMS, and serves as an executer of commands sequences. The OOCE uses the SCL engine to execute a series of SCL command scripts to perform a rapid on-orbit checkout of subsystems / components of the spacecraft in 1-3 days. The ATE is a planning and scheduling tool which receives requests for “activities” and uses the SCL scripts to verify the validity of the “activity” prior to execution, and scheduling the “activity” for execution or re-scheduling the same depending on verification results. Automated Mission Planning System (AMPS) supports the ATE operations. The ATE uses a priority schedule if multiple “activities” are to be executed.

The present invention concerns a method of processing traffic data in Layer 2 of a wireless communications system, whereby the MAC layer is arranged, after receipt of a traffic data volume report from the RLC layer, to process said data volume report and to then issue an acknowledgement message to the RLC layer. The method ensures that the RLC and MAC layers are synchronised with respect to traffic data processing. The MAC layer may be arranged to issue an acknowledgement to the RLC layer only where it determines from processing a data volume report that the RLC layer is not permitted to transmit data in a next or subsequent corresponding TTI. The present invention also concerns a process for data discard in a Radio Link Control (RLC) layer of a Wideband Code Division Multiple Access (WCDMA) wireless communications system such as a Universal Mobile Telecommunications System (UMTS). The process involves, responsive to the triggering of a data discard operation, determining whether the RLC layer is permitted to transmit data. Where it is determined that the RLC layer is not permitted to transmit data in a next or subsequent TTI, the method includes the step of informing the RLC layer that data is not required.

In embodiments of the present disclosure improved capabilities are described for increasing the bandwidth in a network, where centralized optimization servers are utilized to reduce the time-latency for applications being run from a user device. Further, by associating additional local optimization servers, application functionality may be optionally transferred from the centralized optimization server to the local optimization server in instances where a number of user devices are requesting the same data via their access through the same access node, and in other instances, to the effect that associated communication network bandwidth utilization is reduced or eliminated.

The present invention relates to a preamble allocation method and a random access method in a mobile communication system. In the present invention, one among preamble resources is allocated to specific mobile stations in advance, before random access. The mobile stations request random access by transmitting a preamble based on the pre-allocated preamble resource to a base station. It is therefore possible to prevent collision caused by the fact that other mobile stations transmit the same preamble.

An apparatus and method for performing a handover in a communication system are provided, in which an MS transmits a BR code to a base station, requesting a bandwidth for transmission of a handover indication message, is allocated a bandwidth for transmission of the handover indication message according to the BR code from the base station, and transmits the handover indication message in the allocated bandwidth to the base station.

A standard cell library is disclosed. The standard cell library contains cells wherein at least one transistor in at least one cell is annotated for gate length biasing. Gate length biasing includes the modification of the gate length, so as to change the speed or power consumption of the modified gate length. The standard cell library is one used in the manufacturing of semiconductor devices (e.g., that result as semiconductor chips), by way of fabricating features defined on one or more layouts of geometric shapes. The annotations serve to identify which ones of the transistor gate features are to be modified before using the geometric shapes for manufacturing the semiconductor device.

A method and apparatus for receiving system information from a Base Station (BS) in a Mobile Station (MS) in a mobile communication system are provided, in which it is determined whether there is buffered system information in a buffer, if current system information has an error, it is determined whether a combining condition is satisfied, in the presence of the buffered system information, the combining condition being defined by at least one of a Master Information Block (MIB) value tag, a System Information Block (SIB) value tag, and modification time information that are associated with the current system information, and the current system information is combined with the buffered system information, if the combining condition is satisfied.

A method of fabricating a liquid crystal display panel is provided, which comprises the steps of providing a substrate; forming a mask layer over the substrate, wherein the mask layer has a reverse-tapered opening exposing a predetermined conductive line area; depositing a metal layer on the substrate within the predetermined conductive line area to form a conductive line with a tapered sidewall by performing an anisotropic deposition process; and removing the mask.