32results about How to "Eliminate transmission delays" patented technology

A computer based virtual reality trading system for trading financial products such as commodities and stocks uses a server based system for generating a virtual trading floor to simulate an exchange. Traders use local PC's to direct their individual avatars interactively on the virtual trading floor, using hand and voice signals similar to a non-virtual exchange. This allows an exchange to be de-coupled from its physical geographic location as traders in diverse locations can interact on the virtual trading floor. The system enables accurate tracking for audit of the trade activity and simplified trade clearing, while retaining the dynamics of a non-virtual exchange.

Provided is a stream signal transmission device that can eliminate transmission delay fluctuation with a fast change such as network jitter with high accuracy and synchronize a plurality of streams. The stream signal transmission device includes at least one reception unit that receives a stream signal to which a time code is attached from a network, at least one extraction unit that extracts the time code from the stream signal received by the reception unit, and at least one delay control unit that determines an output time by adding a predetermined fixed delay to a time indicated by the time code extracted by the extraction unit, and outputs the stream signal received by the reception unit after holding the stream signal up to the output time.

The invention discloses a low-latency metadata access method of a cloud storage client, aiming to solve the problems of slow metadata access response and the like during metadata access. The technical proposal is as follows: a metadata access module composed of a metadata definition module, a metadata importing module, a metadata request response module and a metadata uploading module is mounted on the cloud storage client node; the metadata definition module determines the content and the format of the used metadata; the metadata importing module imports a metadata file into a key value pair database from the cloud storage server; the metadata request response module performs metadata operation according to a metadata access command; and the metadata uploading module uploads a local metadata file to the cloud storage server. Due to the adoption of the low-latency metadata access method provided by the invention, the network transmission latency of metadata access can be eliminated, the metadata server can be prevented from becoming performance bottleneck, the condition that the same cloud storage client node can access heteroid cloud storage systems is supported and the security of the metadata is improved.

Provided are method and apparatus for dynamically allocating unlink bandwidth in Ethernet PON. In the method and apparatus, report value, which are received for each logical link identifications (LLID), is controlled to be less than a maximum gate value set for each LLID in sequence for all of LLIDs without a predetermined interval. A gate having a length corresponding to the restricted report value is generated. LLIDs are grouped into classes and processing is done class by class. For each class processing, if maximum processing time is reached or maximum total allocation is reached, the processing is switched to a lower class. Also each class processing, if any higher class has its maximum yield processing time or maximum yield allocated gate reached, the processing is switched to that higher class.

The invention discloses a gas jet flow type blue adding combined ejector. The ejector comprises a double-layer casing pipe, a blue adding channel is formed in a pipe side of the double-layer casing pipe, a compression air channel is formed in a shell side, and the blue adding channel and the compression air channel are coaxial and are isolated from each other; a pneumatic nozzle is formed in the front end of the double-layer casing pipe and comprises a nozzle shell, a casing pipe joint and a rotary flow core; an annular nozzle gas phase channel is formed between the nozzle shell and the rotary flow core, a nozzle liquid phase channel is formed in the rotary flow core, and the two channels are communicated with the front end of the blue adding channel and the front end of the compression air channel correspondingly; the outlet end of the nozzle gas phase channel is provided with a compression air ring line outlet, and the outlet end of the nozzle liquid phase channel is provided with a blue adding ejecting hole; the rear end of the compression air channel is sealed, a compression air inlet pipe is arranged on the rear portion of the compression air channel, and a compression air inlet is formed in the compression air inlet pipe; a blue adding inlet is formed in the rear end of the blue adding channel. According to the ejector, compression air is used for serving as a blue adding ejecting power source, and pump-free quantitative ejecting of added blue is achieved.

An object of the present invention is to provide means for eliminating a transmission delay when transmitting emergency information for the sake of relief, security, or the like in a wireless device in conformity with the wireless LAN standard in which if radio waves transmitted from peripheral devices are detected, transmission has to be stopped. In a multimode wireless communication scheme having two or more communication schemes, priorities of the communication schemes are set. A high priority or low priority regarding to a message is described in a“message type” data field of a frame of a controlling channel output from the access point side to the terminal side. When the frame of the controlling channel is decrypted on the terminal side, the message type is confirmed, so that the type of a service channel used thereafter is confirmed and the channel is coupled.

Provided are a method and system for synchronizing a robot with a server. The service sends a time service command including a current time of the server to the robot, and the robot receives the time service command, so as to enable time synchronization of the robot with the server. A control device receives first command data carrying a first timestamp sent from the server, and then determines whether the first timestamp in the first command data has expired. If the first timestamp has expired, the control device receives command data resent from the server until second command data carrying an unexpired second timestamp is received. Finally, the control device controls the robot to execute a corresponding action at a time corresponding to the second timestamp based on the second command data, so as to realize the synchronization of the robot with the command data sent from the server.

A network master (M) having charge of an operation of a main device (L) and one or more network slaves (S1 to S3) each having charge of a safety determining device (A to C) for determining safety which is an operating permission condition of the main device (L) are connected on the network. Each network slave comprises means for selectively performing a first operation for transmitting information including data for maintenance of the safety determining device or both determination output of the safety determining device and data for maintenance of the safety determining device, to the network master and a second operation for transmitting information including the determination output of the safety determining device but not including the data for maintenance of the safety determining device at all or hardly including it to the network master. The first operation in the network slave is performed when the main device is in a stopped state and the second operation in the network slave is performed when the main device is in an operating state.

The present invention provides a method and a base station for remote coverage. The method for remote coverage comprises: the base station determines loopback delay according to an initial radius which is the radius of an initial coverage cell by the base station; the base station adjusts downlink transmission time and the uplink receiving time between the remote user equipment UE based on the look back delay; and the base station communicates with the remote UE based on the adjusted downlink transmission time and the uplink receiving time. The embodiment of the present invention adjusts the downlink transmission time and/or the uplink receiving time of the base station to eliminate the transmission delay caused by remote communication, and realizes remote coverage of the base station on the basis of no-changing the present networking protocol.

The invention discloses a multichip synchronization structure based on a time-digital converter circuit. The multichip synchronization structure comprises N circuit chips provided with built-in time-digital converters and time sequence regulation modules. Each chip contains a synchronization indicating signal receiving end, a synchronization indicating signal output end, one time-digital converter and one time sequence regulation module, wherein the synchronization indicating signal receiving end is used for receiving a synchronization indicating signal input into the chip externally; the synchronization indicating signal output end is used for outputting a synchronization indicating signal subjected to time sequence resampling through a trigger in the chip, wherein the sampling frequency of the trigger is completely aligned with a time sequence of a maximum frequency clock; the time-digital converter is used for quantizing time sequence delays of two input signals into digital values, wherein the input signal IN1 is the synchronization indicating signal input into the chip externally, and the input signal IN2 is the synchronization indicating signal subjected to time sequence resampling through the trigger in the chip; and the time sequence regulation module is used for regulating output delays of the synchronization indicating signals according to the input digital values. By the adoption of a daisy chain structure, the load on a synchronization indicating signal source is relieved.

The invention discloses a CAN FD bus automatic control system and method based on hardware logic. The CAN FD bus automatic control system comprises an upper PC and a lower computer hardware circuit. The lower computer hardware circuit comprises a microcontroller, a Bluetooth module, a USB3.1 module and a CAN FD transceiver; the lower computer hardware circuit is wirelessly connected to the PC through a USB3.1 cable or Bluetooth, and the lower computer hardware circuit is connected and communicated with the controlled node through a CAN FD bus CANH and a CAN FD bus CANL at the same time; the microcontroller is connected with at least four CAN FD controllers; a TX pin and an RX pin of each CAN FD controller are respectively connected with a TX pin and an RX pin of the CAN FD transceiver; theCANH of the CAN FD transceiver is connected to the CAN FD bus CANH, and the CANL of the CAN FD transceiver is connected to the CAN FD bus CANL. According to the invention, the non-real-time performance of the upper computer and the influence caused by transmission delay are eliminated, the control precision is improved, and the cost of the control system is reduced.

A signal transmission loss compensation circuit is connected with a digital signal transmission line in parallel and used for carrying out loss compensation on digital signals transmitted through the transmission line. The compensation circuit comprises a direct current level compensating circuit and an edge port adjusting circuit. And the edge port adjusting circuit is connected with the digital signal transmission line and is used for adjusting a digital signal edge port and adjusting a data conversion rate. And the direct current level compensation circuit is connected with the digital signal line port and the output end of the edge port adjustment circuit, and is used for increasing the direct current level value of the digital signal when the level is high.

The invention discloses a prepreg, a laminated board and a printed circuit board. The prepreg includes a halogen-free epoxy resin composition and a partially cured nonwoven reinforcing material impregnated therein. The nonwoven reinforcing material has a dielectric strength of 1.5-4.8 and a loss factor of below 0.003 at 10 GHz, and the halogen-free epoxy resin composition includes, by weight, (a)100 parts of a halogen-free naphthalene type epoxy resin, (b) 10-25 parts of a DOPO modifying hardener, (c) 25-45 parts of a cyanate ester resin, (d) 35-60 parts of bismaleimide, (e) 45-65 parts of anon-DOPO flame retardant and (f) 0.5-15 parts of a hardening accelerator. The prepreg effectively improves the delay effect, and has the characteristics of high glass transition temperature, low dielectric loss, high heat resistance and high storage modulus.

A take-off tube assembly for transferring a preform and methods of use are discussed. The assembly has walls defining a receptacle, and the receptacle has an open end with a cross sectional area. A preform guide is located along the walls of the receptacle, the preform guide having an open end with a cross sectional area smaller than the cross sectional area of the receptacle. A vacuum inlet is also be present, allowing connection of the assembly to a vacuum so that a vacuum draw can facilitate transfer of the preform to the take-off tube.