90results about How to "Improve transfer throughput" patented technology

An IC Card includes a microchip having memory portions storing programs and a plurality of electrical contacts including a first set of electrical contacts connected to the microchip for supporting respective and predetermined functions, according to a predetermined ISO 7816 standard that reserves a second set of the electrical contacts for future use. At least one electrical contact of the second set is further connected to the microchip and is configured by one or more of the programs for supporting respective additional functions.

Significant improvement in Raptor codes and punctured LDPC codes are obtainable by use of the invention. In both a transmission scheme for Raptor-encoded or LDPC-encoded information, a dynamic adjustment approach is employed. A fraction of a codeword or information frame is transmitted. A feedback signal is sent from the receiver to the transmitter indicating either 1) successful decoding, or 2) failure to decode and / or a feedback signal indicative of a statistical measure of transmission channel quality. If decoding fails, a further portion of the codeword or frame is sent. The intensity and / or size of the fraction is adjusted based on the feedback signal. In one embodiment, a specific range for probabilities employed in the encoding process for Raptor codes provides the ability to increase transmission throughput. Further it has been found that the advantageous Raptor codes are useful in noise conditions where even the improved punctured LDPC codes of the invention begin to degrade.

Disclosed is a method for uplink transmission and reception in a wireless communication system and an apparatus therefor. Particularly, a method for performing uplink transmission by a user equipment (UE) in a wireless communication system includes: receiving sounding reference signal (SRS) resource configuration information form a base station, in which the SRS resource configuration information includes SRS resource information and association configuration information between a first SRS and a second SRS that is a target of the SRS resource configuration information; and transmitting precoded the second SRS to the base station on an SRS resource indicated by the SRS resource information, and the second SRS may be transmitted based on the precoding applied to the first SRS indicated by the association configuration information.

The invention discloses a transmission control protocol method for a satellite network, which is a control method for data transmission in a transport layer of the satellite network and is used for flow control and error control of transmission in the network so as to realize high-efficiency data transmission. The method is mainly used for improving congestion avoidance in congestion control through the following steps of: probing an optimal transmission window by dichotomous increase; and then differentiating a congestion error code by a prediction method for calculating the number of data packets being transmitted in the current network so as to effectively solve the problem of high error rate. Meanwhile, a selective acknowledgement (SACK) mechanism is adopted to only retransmit the discarded packets as much as possible when the packets are discarded so as to reduce the possibility of discarding a plurality of packets in primary window data transmitted at a high error rate and improve the utilization ratio of the network. The method can realize high-efficiency data transmission when used in the satellite network with high error rate and large time delay.

A method of transmitting data from a user terminal to a base station using a hybrid automatic repeat request (HARQ) scheme with a plurality of redundancy versions of said data, each of the redundancy versions (RV) indicating a transmission start position of a data block in a circular buffer is disclosed. For each retransmission, the redundancy version to be used by considering the previously used redundancy version and a predetermined sequence is determined. Within one sequence, at least two redundancy versions following each other have non consecutive start positions.

The invention discloses a data transmission method. The method comprises: a receiving end receives the capability information of TCP / IP data. The size of the TCP / IP connection window is adjusted according to the capability information and then the adjusted size of the TCP / IP connection window is noticed to a sending end. The TCP / IP data sent by the sending end is received and is cached. The cached TCP / IP data is dispatched and then sent to the receiving end according to the capability information. Simultaneously, the invention discloses a data transmission device and a data transmission system. Using the invention can improve the transmission throughput of the TCP / IP data, guaranteeing the consistency from end to end and avoiding data loss.

There is provided a method for encoding input information bits by a quasi-complementary turbo code (QCTC) at a predetermined code rate to generate codeword symbols and transmitting the generated codeword symbols. The method comprises selecting one pattern among predetermined patterns corresponding to at least one of the generated codeword symbols in order to transmit the generated codeword symbols by a sub-packet length determined according to a data rate; reading information corresponding to the data rate, the sub-packet length and the selected pattern from a table in which identification information indicating the data rate, the sub-packet length and the selected pattern is previously mapped to given information; and transmitting the generated codeword symbols according to the read information and the selected pattern.

A method to detect a lost status report determines that a second status report is required when an AMD PDU not negatively acknowledged in the first status report, an AMD PDU with a polling bit set, or the last negatively acknowledged AMD PDU is received after the expiry of a roundtrip timer and before all the negatively acknowledged AMD PDUs in the first status report are received. The method provides a deterministic way of detecting a lost status report, resulting in improved transmission throughput in a wireless communications system.

The invention relates to a high bit-error long time-delay network self-adaptive transmission method based on network coding. A transmitting terminal conducts self-adaptive network coding to transmitted TCP messages according to the magnitude of the flow of a transmission layer and then transmits the coded messages to a receiving terminal. The receiving terminal obtains original messages through network decoding restoration. Since the transmitting terminal conducts redundant coding to the transmitted messages and the receiving terminal can restore the original transmitted messages as long as partial coded messages are received, the impact of high link bit errors on transmission performance is greatly reduced, the transmission protocol throughput is higher, the retransmission rate of the messages is greatly decreased and the transmission performance is greatly promoted. Moreover, since the self-adaptive coding method is adopted, the confidentiality of information is improved. The methodrequires no support from intermediate nodes for transmission, belongs to an end-to-end reliable transmission acceleration method and is compatible with the current popular reliable transmission protocols.

The invention discloses a multi-path parallel-transmitted data scheduling method and a transmission control protocol. The characteristics are that a dynamic value cwnd[r] of a congestion window is adjusted according to the following mode: when a path r successfully receives an ACK, the cwnd[r] of the congestion window increases by alpha / cwnd[total]; when the path r detects that a grouped packet is lost, the cwnd[r] of the congestion window decreases by max(beta*cwnd[r], cwnd[r] / 2). The multi-path parallel-transmitted data scheduling method based on congestion window dynamic adjusting of the invention gives full consideration to influences by link delayed differentiation to transmission quality; path delay factor parameters are introduced in a congestion window control mechanism so as to realize effective reduction of path transmission quality differentiation and avoid excessive congestion of the optimal link, thereby improving the MPTCP transmission throughput and improving user experience.

The invention provides a method of adjusting a satellite relay data transmission communication rate in a self-adaptive manner, and aims to provide a transmission method which is low in time delay andreliable in transmission, and can efficiently improve data transmission throughput. The method is realized through the following technical solution: in an aircraft flight process, calculating of a pointing angle alpha of a phase control array antenna and an antenna pointing angle beta in real time by a relay terminal wave beam pointing calculation module, sending the same into a data finding module, using the pointing angle alpha of the phase control array antenna and the antenna pointing angle beta as a finding address to find and obtain actual effective isotropic radiated power (EIRP) of thephase control array antenna in real time from a memory of a relay terminal by the data finding module, sending the actual EIRP of the antenna into a threshold comparison criterion module, completingjudgment on the actual EIRP of the phase control array antenna and link status according to the antenna pointing angle alpha and the antenna pointing angle beta, and then completing self-adaptive adjustment of the communication rate according to the link status.

Significant improvement in Raptor codes and punctured LDPC codes are obtainable by use of the invention. In both a transmission scheme for Raptor-encoded or LDPC-encoded information, a dynamic adjustment approach is employed. A fraction of a codeword or information frame is transmitted. A feedback signal is sent from the receiver to the transmitter indicating either 1) successful decoding, or 2) failure to decode and / or a feedback signal indicative of a statistical measure of transmission channel quality. If decoding fails, a further portion of the codeword or frame is sent. The intensity and / or size of the fraction is adjusted based on the feedback signal. In one embodiment, a specific range for probabilities employed in the encoding process for Raptor codes provides the ability to increase transmission throughput. Further it has been found that the advantageous Raptor codes are useful in noise conditions where even the improved punctured LDPC codes of the invention begin to degrade.

In the bus system, bus interface apparatuses and routers are connected together through packet exchange buses which have been established on the integrated circuit. The bus interface apparatuses are respectively connected to transmission nodes which transmit data of mutually different numbers of bits in one cycle of operation of the bus system. Each of the bus interface apparatuses generates and transmits a packet based on data received from the transmission node connected and header information including size information indicating the number of bits with respect to the transmission node connected. The router analyzes the packet, gets the size information from the header information, determines how to allocate a space in the buffer for storage by reference to the size information gotten, and stores the received packet in the buffer.

The invention relates to a data collection task oriented underwater sound network media access control method. An existing method is inapplicable to a data collection type underwater sound sensor network. The method provided by the invention comprises the steps that a data collection type underwater sound sensor network model is established; when an underwater sound sensor node has a sending demand, the underwater sound sensor node makes a channel appointment to a sink node, and the sink node actively invites other underwater sound sensor nodes to join this round of transmission and carries out transmission scheduling on response packets; after the underwater sound sensor nodes receive invite packets, if the underwater sound sensor nodes have the sending demands, the underwater sound sensor nodes send the response packets according to a scheduling table; the sink node carries out data packet scheduling and broadcasts sequence packets; after the underwater sound sensor nodes receive the sequence packets, the underwater sound sensor nodes sends the data packets to the sink node according to the scheduling table; and the sink node receives the data packets completely and then broadcasts acknowledgement packets. The method provided by the invention is applicable to the data collection type underwater sound sensor network, the network throughput and a channel appointment success rate are improved, and the method is also applicable to the data collection type underwater sound sensor network with mobile nodes.

A wireless communication method includes attempting to establish a first wireless connection. Next, an attempt is made to establish a second wireless connection using a different channel from the first wireless connection. Subsequently, a determination is made as to whether the first wireless connection and the second wireless connection are established. When the first wireless connection and the second wireless connection are established, a manner of signal transmission between the first wireless connection and the second wireless connection is coordinated to transmit uplink data and downlink data, respectively, such that a duplex mode of operation is realized.

Disclosed is a method for uplink transmission and reception in a wireless communication system and an apparatus therefor. Particularly, a method for performing uplink transmission by a user equipment (UE) in a wireless communication system includes: receiving sounding reference signal (SRS) resource configuration information form a base station, in which the SRS resource configuration information includes SRS resource information and association configuration information between a first SRS and a second SRS that is a target of the SRS resource configuration information; and transmitting precoded the second SRS to the base station on an SRS resource indicated by the SRS resource information, and the second SRS may be transmitted based on the precoding applied to the first SRS indicated by the association configuration information.

A recording medium transfer apparatus includes a motor control unit for controlling the motor to rotate at higher speed when the recording medium is fed to the liquid ejection area than that when the recording medium is discharged out of the liquid ejection area, and a feed control unit for controlling a next recording medium to be fed simultaneously with discharge of the recording medium, if a position of a rear end of the recording medium when recording or printing has been finished is situated upstream of a predetermined position, which is upstream of the discharge roller as much as a distance between a feed start position of the recording medium and the liquid ejection area, whereas controlling the next recording medium to start to be fed after discharge of the recording medium has been finished, if the position of the rear end of the recording medium when recording or printing has been finished is situated downstream of the predetermined position.

A data transfer device calculates a compression performance value which represents a quantity of data that can be compressed per unit time and a transfer performance value which represents a quantity of data that can be transferred per unit time, and calculates, based on these values, a compression ratio which represents a ratio of data to be compressed and then transferred to total data to be transferred. The data transfer device extracts, from a storage unit which stores data, the data to be transferred, and then compresses part of the extracted data based on the compression ratio, and transfers the compressed data and remaining data to another device. The compression and transfer processes are performed in parallel.

A method for an end-to-end hybrid automatic repeat request and a system thereof are provided. The method is applicable in a cognitive radio network (CRN) including at least a source node and a destination node. There are paths between a source node and a destination node in the CRN, and each path has a plurality of wireless links. The method includes the following steps. The source node encodes information into a coded packet, divides the coded packet into coded sub-packets, and transmits the coded sub-packets to the paths. Through the wireless links of each path, a coded sub-packet is amplified and forwarded to the destination node. In addition, the destination node combines the coded sub-packets for decoding so as to recover the information, and transmits an acknowledgement packet to the source node for notifying whether the information is successfully recovered.

There is provided at least one processor block including a plurality of load store interfaces (801, 804), a plurality of memory banks (821), an input / output port having at least one of an input port (850) and an output port (860), and a crossbar switch (810), and the crossbar switch connects the load store interface, the memory bank and the input / output port to each other and the load store interface constitutes a data processor in order to control a data transfer to the memory bank. Consequently, there is implemented a data processor having a high transfer throughput and a flexibility and efficiently treating stream data.

A method, apparatus and computer product for scheduling in a cellular system using a wired RS is disclosed. In one aspect, a BS collects CQIs of all MSs within a cell, calculates a transmittable data amount for each of the MSs according to the CQI, selects an MS having a highest PF metric, and allocates resources to the selected MS.

The invention discloses a method used for realizing Space Division Multiple Access (SMMA)by a TD-SCDMA indoor distribution system, comprising the steps as follows: an uplink associated special physical channel is estimated, thus gaining the symbol average energy of each uplink associated special physical passage of each user in the measurement period; the passage of each user with the highest symbol average energy is selected as the best emission passage of each user; the symbol average energies of best emission passages of every two users are compared to judge whether each user can be space-divided or not; the deploying authority of the uses which can be space-divided is calculated; the space division users are grouped according to a rule arranged in advance; the space division users of the same group are code-reused in a way of space division multiple address; space reuse of the same code resource is carried out by introducing the SDMA technique of the indoor distribution system and the natural insulation of the floors, thus effectively improving the utilization ratio of the code resource, improving the transmission throughput of the downlink data and the transmission efficiency of the system.

A probability of collision when a plurality of mobile station devices use contention based (CB) transmission is reduced. Provided is a mobile station device which performs the CB transmission, based on a control signal received from a base station device. The mobile station device includes a control information extraction unit 105 that extracts the control signal for CB transmission from the control information; a clipping unit 107 that generates a partial spectrum by removing a portion of a spectrum, from a spectrum of a transmit signal, based on the extracted control information for CB transmission; and a transmission unit 125 that transmits a signal with the partial spectrum to the base station device.

The invention relates to an encoding method used for dispatched data packets by a network encoding layer and a decoding method used for received data packets by the network encoding layer. The network encoding layer is applied between a TCP and An IP. The encoding method includes: a plurality of encoding matrixes are arranged; when the network encoding layer receives the data packets sent to a receiving terminal by the TCP, the amount of remaining space of the current encoding matrix is judged whether to be larger than zero, if so, the data packets are placed into the current encoding matrix to carry out linear encoding, a linear encoding combined packet is generated, and a packet header of the combined packet comprises coefficients of the linear encoding, index numbers of the encoding matrixes and serial numbers of the data packets; and otherwise, the second encoding matrix chosen from the two or more encoding matrixes serves as the current encoding matrix, and encoding is tried again. The decoding method basically corresponds to the coding method. According to the encoding method and the decoding method, with the help of the plurality of matrixes, the coding and the decoding are carried out, and TCP transmission throughput is improved under the high-capacity wireless environment.

A recording medium transfer apparatus includes a motor control unit for controlling the motor to rotate at higher speed when the recording medium is fed to the liquid ejection area than that when the recording medium is discharged out of the liquid ejection area, and a feed control unit for controlling a next recording medium to be fed simultaneously with discharge of the recording medium, if a position of a rear end of the recording medium when recording or printing has been finished is situated upstream of a predetermined position, which is upstream of the discharge roller as much as a distance between a feed start position of the recording medium and the liquid ejection area, whereas controlling the next recording medium to start to be fed after discharge of the recording medium has been finished, if the position of the rear end of the recording medium when recording or printing has been finished is situated downstream of the predetermined position.

There is provided a method for encoding input information bits by a quasi-complementary turbo code (QCTC) at a predetermined code rate to generate codeword symbols and transmitting the generated codeword symbols. The method comprises selecting one pattern among predetermined patterns corresponding to at least one of the generated codeword symbols in order to transmit the generated codeword symbols by a sub-packet length determined according to a data rate; reading information corresponding to the data rate, the sub-packet length and the selected pattern from a table in which identification information indicating the data rate, the sub-packet length and the selected pattern is previously mapped to given information; and transmitting the generated codeword symbols according to the read information and the selected pattern.

System and method for providing multiple access in a multi-band, orthogonal frequency division multiplexed (multi-band-OFDM) communications system. A preferred embodiment comprises determining a transmission bandwidth to support a performance requirement and configuring transmission bands in the multi-band-OFDM communications system based upon the transmission bandwidth, wherein the transmission bands may be made up of smaller transmission bands bonded together. Further comprising initializing communications with the configured transmission bands. The use of bonded transmission bands can provide increased data rates and / or increased range performance.