33 results about "Effective data transfer rate" patented technology

Multi-drop communications channels can have significantly deep notches in their frequency response causing a corresponding limitation of the effective data transmission rate. A special time-ordered coding method is described which results in the emitted spectrum of the data stream transmitted into the channel having a notch at the same frequency as the notch in the channel frequency response, permitting channel receivers to successfully decode the transmitted data stream. The described coding method may be applied at various multiples of the channel notch frequency to support different throughput rates, and may be combined with other coding techniques such as group or vector signaling codes.

Multi-drop communications channels can have significantly deep notches in their frequency response causing a corresponding limitation of the effective data transmission rate. A special time-ordered coding method is described which results in the emitted spectrum of the data stream transmitted into the channel having a notch at the same frequency as the notch in the channel frequency response, permitting channel receivers to successfully decode the transmitted data stream. The described coding method may be applied at various multiples of the channel notch frequency to support different throughput rates, and may be combined with other coding techniques such as group or vector signaling codes.

The invention belongs to the field of radar technologies, and relates to a CE-OFDM (Constant Envelope Orthogonal Frequency-Division Multiplexing) based radar communication integration system. The invention is a CE-OFDM based super-resolution radar communication integration scheme which is provided on the basis of a traditional OFDM radar communication integration scheme, compensated through communication information, and capable of improving the effective data transmission rate and solving a problem that the PAPR of OFDM signals is too high. A transmitting terminal firstly turns data to be transmitted into CE-OFDM symbol frames through QAM (Quadrature Amplitude Modulation), IFFT (Inverse Fast Fourier Transform) and phase modulation, and a single pulse in a pulse repetition period is replaced by using a CE-OFDM symbol, so that the data transmission rate is improved, and the problem that the PAPR of transmitted signals is too high is solved. At a receiving terminal, received waveform pulses are demodulated, an inverse process of the transmitting process of the CE-OFDM system is carried out on the signals, and data can be demodulated; and the transmitting waveform is known, pulse compression processing is carried out on received echo waves, and super-resolution estimation for the distance and the speed of a target can be accomplished through decorrelation processing and an MUSIC algorithm after information compensation.

The invention relates to a method for sharing channels, comprising the following steps of: A. distributing an idle registration channel for a cognitive user; B. detecting whether an authorized user appears or not, if the authorized user appears, distributing the registration channel for the authorized user, and measuring an interference temperature threshold for ensuring that the authorized user normally uses the registration channel, acquiring the maximum available power of the cognitive user according to the interference temperature threshold, and if the authorized user does not appear, continue to detecting; and C. calculating whether the cognitive user can carry out data transmission or not by using the maximum available power, if so, regulating the transmitting power of the cognitiveuser, and if not, switching the cognitive user to the idle channel. Moreover, the invention also relates to a system for sharing channels. The method and the system for sharing channels judge whetherthe cognitive user can carry out data transmission or not by using the maximum available power to control the action of the cognitive user, which greatly reduces the frequency spectrum switching efficiency, improves the frequency spectrum use ratio and network performance and meanwhile also improves the effective data transfer rate.

A transfer start / end detecting section detects timing at which a DMARQ signal becomes an H level or an L level. A transfer time-measuring section measures a transfer time during which data transfer is actually performed within a period in which a predetermined number of data blocks are transferred. A transfer byte count-measuring section measures a transferred byte count of data that have successfully been transferred. An effective data transfer rate-computing section computes an effective data transfer rate by dividing the transferred byte count by the transfer time. A transfer rate-comparing section compares the effective data transfer rate with a transfer rate that is one step slower than a current transfer rate output from a selectable transfer rate-storing section. If the former is slower, a transfer rate-switching section switches to the transfer rate that is one step slower. A large decrease in the effective data transfer rate caused by data corruption is prevented.

In accordance to one aspect, a method for optimizing the effective data transmission rate in a bus system, in particular in automation technology is provided. A data telegram used in higher-order data networks based on the Internet protocol, with at least one data telegram, at least one data segment and / or at least one data section being generated and / or modified and / or deleted by at least one slave. The topology of the bus system can hereby be selected according to the application and is taken into account in the configuration of the data contained in the data telegrams, without infringing the protocol characteristics of the higher-order data network. The number of data telegrams required is hereby significantly reduced, in particular on communication links with maximum loading.

Position detection means (11), time detection means (12), weather detection means (13), and transmission rate detection means (14) detect the current position, the current time, the weather, and the valid data transmission rate of a mobile reception device (3). According to the detection results, communication environment information is generated. The communication environment information is used for prediction or recognition of the communication condition between the transmission device and the mobile reception device.

The invention discloses an optimal relay selection method based on a social threshold in D2D cooperative communication. The method comprises the following steps: in the detection phase of each relay node, firstly a DT sends a detection data packet to a relay user rj, the relay user rj obtains a social trust value (the formula is as shown in the specification) with the DT and an instant signal to noise ratio(the formula is as shown in the specification) with a DT-relay link; if (the formula is as shown in the specification) is greater than or equal to the threshold (the formula is as shown in the specification) of the set social trust value, the relay user rj continues to detect the relay-DR link; the received detection data packet is forwarded to the DR at transmission power in directly proportional to (the formula is as shown in the specification), the DR obtains the signal to noise ratio (the formula is as shown in the specification) and feeds back (the formula is as shown in the specification) to a D2D transmitting end DT; otherwise, the relay user rj is not will to provide relay service for the DT, and the DT detects the next relay node; and the DT calculates the data transmission rate Cj of the relay link of the relay user rj that is will to provide the relay service for the DT and selects the optimal relay node according to the optimal stopping theory. By adoption of the optimal relay selection method disclosed by the invention, the detection time of the relay link can be effectively shortened, and the effective data transmission rate and the throughput of the relay link are improved.

The invention relates to a hydraulic support frame data collecting method, a hydraulic support frame data collecting system and a hydraulic support frame centralized control system. The hydraulic support frame data collecting method comprises the following steps of: obtaining the number of a located hydraulic support frame of a coal mining machine; determining the number of an adjacent hydraulic support frame of the coal mining machine according to the number of the located hydraulic support frame of the coal mining machine; and collecting the support frame information data of the hydraulic support frames according to the number of the located hydraulic support frame of the coal mining machine and the number of the adjacent hydraulic support frame of the coal mining machine. The support frame information data of the located hydraulic support frame and the adjacent hydraulic support frame of the coal mining machine are collected, and the polling of the data of all of the hydraulic support frames is not needed, so that a remote control center can timely obtain the effective hydraulic support frame data; the effective data transmission speed of the remote control center and a fully mechanized coal mining face is accelerated; meanwhile, the effective data transmission effect is accelerated, so that the operation speed of the coal mining machine can be properly accelerated; the automatic mining efficiency is further improved; and the hydraulic support frame data collecting method, the hydraulic support frame data collecting system and the hydraulic support frame centralized control system can be widely applied to the automatic mining field.

Systems and methods for performing data transfer rate throttling o improve the effective data transfer rate for SATA storage devices. The data transfer rate is diluted by inserting ALIGN primitives when data is sent. The receiving device simply discards the ALIGN primitives. Therefore, the receive data FIFO does not fill as quickly and fewer flow control sequences are needed for flow control to prevent the receive data FIFO from overflowing. An advantage of using the ALIGN primitives instead of conventional flow control is that the round-trip handshake latency is not incurred to disable and later enable data transfers.

To include first and second data input / output terminals allocated to first and second memory circuit units, respectively, and an address terminal allocated in common to these memory circuit units. When a first chip selection signal is activated, the first memory circuit unit performs a read operation or a write operation via the first data input / output terminal based on an address signal regardless of an operation of the second memory circuit unit. When a second chip selection signal is activated, the second memory circuit unit performs a read operation or a write operation via the second data input / output terminal based on the address signal regardless of an operation of the first memory circuit unit. With this configuration, a wasteful data transfer can be prevented, and the effective data transfer rate can be increased.

An ultra-wideband communication system 101 comprises a first device 103, such as a host device or server, which communicates with a second device 105, such as a portable device. The first device 103 comprises a memory 107 for storing data, for example a movie, that is to be downloaded to the second device 105. The first device 103 includes an ultra-wideband transmitter 109 for transmitting data over an air interface to an ultra-wideband receiver 113 in the second device. The effective data transfer rate between the first device 103 and the second device 105 is increased by concatenating two or more frequency sub-bands in a multi-band orthogonal frequency division multiplexing scheme, such that the transmitter 109 in the first device 103 is configured to behave like a number of transmitters, all bursting at the same time. In addition, means are provided for enabling the second device 105 to be located in a fixed positional relationship with the first device 103 during the data transfer operation. The range of the ultra-wideband transmission is reduced significantly to a distance “d” which, in combination with the securing of multiple UWB sub-bands, enables the data throughput to be increased significantly. The distance “d” is less than 30 cm, and preferably touching (without electrical contact).

To include first and second data input / output terminals allocated to first and second memory circuit units, respectively, and an address terminal allocated in common to these memory circuit units. When a first chip selection signal is activated, the first memory circuit unit performs a read operation or a write operation via the first data input / output terminal based on an address signal regardless of an operation of the second memory circuit unit. When a second chip selection signal is activated, the second memory circuit unit performs a read operation or a write operation via the second data input / output terminal based on the address signal regardless of an operation of the first memory circuit unit. With this configuration, a wasteful data transfer can be prevented, and the effective data transfer rate can be increased.

This invention provides a data transfer device, data transfer system, and data transfer method.a transfer start / end detecting section detects timing at which a DMARQ signal becomes an H level or an L level. A transfer time-measuring section measures a transfer time during which data transfer is actually performed within a period in which a predetermined number of data blocks are transferred. A transfer byte count-measuring section measures a transferred byte count of data that have successfully been transferred. An effective data transfer rate-computing section computes an effective data transfer rate by dividing the transferred byte count by the transfer time. A transfer rate-comparing section compares the effective data transfer rate with a transfer rate that is one step slower than a current transfer rate output from a selectable transfer rate-storing section. If the former is slower, a transfer rate-switching section switches to the transfer rate that is one step slower. A large decrease in the effective data transfer rate caused by data corruption is prevented.

The invention discloses a system and a method for executing data transferring rate adjustment to improve the effective data transfer rate of a serial ATA storage apparatus. When the data is transferred, the insertion of an ALIGN primitive element reduces the data transferring rate. A receiving device only abandons the ALIGN primitive element. Thus a receiving data First-In First-Out (FIFO) is not filled in and a flow control sequence with less flow control demand prevents the data FIFO from overflow. The advantage of the ALIGN primitive element instead of the conventional flow control is that the ALIGN does not cause a roundtrip signal switching delay and discontinuation and later starts the data transfer.

The invention discloses a self-adaption transmission mode selecting system and method for a vehicle communication access network. The system comprises a vehicle information service flow generating module, a vehicle information service flow classifying and mapping module, a grouping and submitting module, a self-adaption transmission mode selecting module, an OFDMA wireless resource allocating module, a frame sending / receiving module and an access channel / driving state / local geographic area information detecting module which are arranged at the I / B position. The system further comprises a vehicle information service flow generating module, a vehicle information service flow classifying and mapping module, a grouping and submitting module, a self-adaption transmission mode selecting module, an OFDMA wireless resource allocating module, a frame sending / receiving module and an access channel / driving state / local geographic area information feedback module which are arranged at the SV position. The self-adaption transmission mode selecting system introduces an OFDMA technique and an AMC technique, can balance ITS information service flow transmission effectiveness and system transmission efficiency, can meet the QoS requirements of various ITS information service flows and meanwhile can acquire high system average effective data transmission rate.

The invention discloses an adaptive bandwidth adjustment method for industrial field communication, which belongs to the technical field of communications. The method comprises the steps of (1) performing early-stage preparation of cyclic communication; (2) estimating the current bandwidth and predicting a channel gain matrix corresponding to the pre-spread spectrum bandwidth by using a Gaussian process regression algorithm after entering cyclic communication; (3) obtaining and comparing the current receiving end rate v; (4) comparing the mean value of the channel gain matrixes H; (5) carryingout cyclic detection when any condition in the step (3) or the step (4) is not met; and (6) carrying out bandwidth adjustment after further judging the channel gain matrix corresponding to the pre-spread spectrum bandwidth when any condition in the step (3) or the step (4) is met. According to the invention, an accurate channel estimation result is obtained by combining a channel estimation algorithm based on an intelligent algorithm and is evaluated; meanwhile, in combination with the effective data transmission rate v of the current receiving end, the bandwidth is dynamically adjusted according to the effective transmission rate V of the specified communication system; and the communication resource cost is saved under the condition that the communication rate requirement is met.

The invention provides a method and a device for selecting an enhanced transport format combination. The method comprises the following steps of: determining the size of a transport block of an enhanced dedicated channel (E-DCH) according to an authorization resource when a high speed uplink packet access (HSUPA) service is established; counting acknowledgement indicators received by an E-HICH in the process of the HSUPA service and adjusting the size of the transport block of the E-DCH according to a counting result; and redetermining the size of the transport block according to the changed authorization resource when the authorization resource changes in the process of the HSUPA service. The method and the device can effectively improve the effective data transmission rate of the HSUPA service.

The invention discloses a self-adaption transmission mode selecting system and method for a vehicle communication access network. The system comprises a vehicle information service flow generating module, a vehicle information service flow classifying and mapping module, a grouping and submitting module, a self-adaption transmission mode selecting module, an OFDMA wireless resource allocating module, a frame sending / receiving module and an access channel / driving state / local geographic area information detecting module which are arranged at the I / B position. The system further comprises a vehicle information service flow generating module, a vehicle information service flow classifying and mapping module, a grouping and submitting module, a self-adaption transmission mode selecting module, an OFDMA wireless resource allocating module, a frame sending / receiving module and an access channel / driving state / local geographic area information feedback module which are arranged at the SV position. The self-adaption transmission mode selecting system introduces an OFDMA technique and an AMC technique, can balance ITS information service flow transmission effectiveness and system transmission efficiency, can meet the QoS requirements of various ITS information service flows and meanwhile can acquire high system average effective data transmission rate.

A wireless LAN access point is configured to perform a shaping operation to calculate and set an upper limit of communication speeds of belonging mobile units when the number of the belonging mobile units is equal to or more than a preset threshold. The wireless LAN access point is configured to extract a highest one or a lowest one of data transfer rates that are detected by analyzing header parts of communication packets to be exchanged respectively with the belonging mobile units as a shaping data-transfer rate. The wireless LAN access point is configured to calculate the upper limit of the communication speeds of the belonging mobile units on the basis of a correction factor that is arbitrarily set for converting the shaping data-transfer rate to an effective data-transfer rate, on the basis of the shaping data-transfer rate, and on the basis of the number of the belonging mobile units.

The invention relates to a hydraulic support frame data collecting method, a hydraulic support frame data collecting system and a hydraulic support frame centralized control system. The hydraulic support frame data collecting method comprises the following steps of: obtaining the number of a located hydraulic support frame of a coal mining machine; determining the number of an adjacent hydraulic support frame of the coal mining machine according to the number of the located hydraulic support frame of the coal mining machine; and collecting the support frame information data of the hydraulic support frames according to the number of the located hydraulic support frame of the coal mining machine and the number of the adjacent hydraulic support frame of the coal mining machine. The support frame information data of the located hydraulic support frame and the adjacent hydraulic support frame of the coal mining machine are collected, and the polling of the data of all of the hydraulic support frames is not needed, so that a remote control center can timely obtain the effective hydraulic support frame data; the effective data transmission speed of the remote control center and a fully mechanized coal mining face is accelerated; meanwhile, the effective data transmission effect is accelerated, so that the operation speed of the coal mining machine can be properly accelerated; the automatic mining efficiency is further improved; and the hydraulic support frame data collecting method, the hydraulic support frame data collecting system and the hydraulic support frame centralized control system can be widely applied to the automatic mining field.

The invention discloses a method for adaptive bandwidth adjustment for industrial site communication, which belongs to the field of communication technology and comprises the following steps: ①preliminary preparation for entering cyclic communication, ②after entering cyclic communication, use Gaussian process regression algorithm to estimate the current bandwidth and Predict the channel gain matrix corresponding to the two pre-spreading bandwidths, ③ obtain the current receiving end rate v and compare, ④ compare the mean value of the channel gain matrix H, ⑤ perform loop detection when any of the conditions in step 3 or 4 are not satisfied, ⑥ satisfy In any case in step 3 or 4, bandwidth adjustment is performed after further judging the channel gain matrix corresponding to the pre-spreading bandwidth. The present invention combines the channel estimation algorithm based on the intelligent algorithm to obtain more accurate channel estimation results and evaluates them, and at the same time combines the effective data transmission rate v of the current receiving end to dynamically adjust the bandwidth size according to the effective transmission rate V of the specified communication system. Communication resource costs are saved where required.

If the number of affiliated slave units is greater than or equal to a predetermined threshold, a wireless LAN access point implements a shaping operation for calculating an upper limit for a communication speed of the affiliated slave units (sequence Seq17), extracts, from among data transfer rates detected by analyzing header parts of communication packets transmitted to and received from the respective affiliated slave units, the highest or lowest data transfer rate as a shaping data transfer rate, calculates the upper limit for the communication speed of the affiliated slave units on the basis of a correction coefficient arbitrarily set for converting the shaping data transfer rate into an effective data transfer rate, the shaping data transfer rate, and the number of affiliated slave units (sequence Seq18), and sets the upper limit as the upper limit for the communication speed of each affiliated slave unit. Consequently, provided is a wireless LAN system in which respective slaveunits can perform fair communication, by setting an upper limit for the communication speed thereof that is appropriate for the environment.

The invention discloses a real-time online simulation system of an MMC type high-voltage frequency converter based on RT-Lab and WiGig. The system includes a host computer, a target machine, a controller, an MMC type high-voltage frequency converter, and a WiGig wireless communication module. The communication specification of the WiGig wireless communication module adopts the G.hn standard. Collect the output signal of the MMC high-voltage inverter control unit through the RT-LAB simulator, realize the capacitor voltage balance control and modulation of the MMC high-voltage inverter rectifier side and the inverter side converter, and simulate the MMC high-voltage inverter in real time The real-time wireless signal interaction between the real equipment of the control unit realizes the simulation control of the MMC type high-voltage inverter. The invention effectively improves the data transmission rate among various components in the system, provides a large amount of technical reference data for the real-time control of the MMC type high-voltage frequency converter, and can greatly shorten the research and development cycle and cost of the MMC type high-voltage frequency converter.

The invention provides a method for improving the image data acquisition rate of a processor, which comprises the following steps of: before the processor acquires image data, only sampling Y data and not sampling U data and V data by utilizing two-frequency-division sampling of a sensor transmission pixel clock PCLK, namely, removing the U data and the V data before the processor acquires the data; and enabling the processor to process all the data after receiving the data, and extract Y data, namely gray data, as image data. The method is simple and easy to operate, the logic circuit is used for controlling the sampling clock so as to control and collect the effective data Y, the data volume to a processor interface is reduced, and the effective data transmission rate is improved.

The invention relates to a method for sharing channels, comprising the following steps of: A. distributing an idle registration channel for a cognitive user; B. detecting whether an authorized user appears or not, if the authorized user appears, distributing the registration channel for the authorized user, and measuring an interference temperature threshold for ensuring that the authorized user normally uses the registration channel, acquiring the maximum available power of the cognitive user according to the interference temperature threshold, and if the authorized user does not appear, continue to detecting; and C. calculating whether the cognitive user can carry out data transmission or not by using the maximum available power, if so, regulating the transmitting power of the cognitive user, and if not, switching the cognitive user to the idle channel. Moreover, the invention also relates to a system for sharing channels. The method and the system for sharing channels judge whether the cognitive user can carry out data transmission or not by using the maximum available power to control the action of the cognitive user, which greatly reduces the frequency spectrum switching efficiency, improves the frequency spectrum use ratio and network performance and meanwhile also improves the effective data transfer rate.