118 results about "Transmission throughput" patented technology

This invention relates to reception and transmission of data over a network. More specifically, this invention relates to Transmission Control Protocol's delayed acknowledgment and improving transmission throughput by adaptively adjusting the use of delayed acknowledgment.

A system and method in various embodiments implements a virtual spectrum band stacking technique facilitating spectrum sharing by converting and combining spectrum bands consisting of several different RF channels, common air interfaces, and radio channel protocols in the radio frequency channel domain to form IP Virtual Radio Channels (IP-VRCs) in the packet data domain. This virtual spectrum stacking technique combines the transmissions of contiguous and non-contiguous RF channels with differing physical layers into IP-VRCs. This technique enables simultaneous parallel high-speed wireless transmission; virtual radio channel hopping for enhanced security; and customized security schemes for different IP-VRC Groups. The deployment of the combination of IP-VRC Groups; Universal “Small Cell” Base Stations; and Universal Wireless End-Point Devices allows the aggregation of all available spectrum bands for use within a building environment. Some benefits of this deployment include expansion of spectrum utilization, service quality, security, applications and transmission throughput for wireless end-point devices.

A method and apparatus is disclosed whereby the scheduling of network transmissions in a wireless backhaul network is determined using a cross-layer optimization algorithm. In a first embodiment, the algorithm assumes a good MAC layer transmit schedule has been provided and computes optimal network layer routes as well as transmit beam patterns and transmit powers in a semi-distributed manner. According to this embodiment, the optimization goal is the throughput from each access point, or node in the network, to the core network. In another embodiment, an independent set of transmitting nodes is determined at the MAC layer in a way such that no link in the set interferes with another link and no link is scheduled to transmit and receive at the same time. According to this embodiment, a column generation algorithm is used to find a maximal weighted independent set and to achieve optimal network transmission throughput.

This invention relates to reception and transmission of data over a network. More specifically, this invention relates to Transmission Control Protocol's delayed acknowledgment and improving transmission throughput by adaptively adjusting the use of delayed acknowledgment.

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 and an apparatus select an access point (AP) in a wireless LAN to associate or reassociate, based on considerations that take into account the quality-of-service (QoS) status of the stations (STAs) and the potential hidden terminal effect. The method utilizes advertised or requested information obtained from an AP which includes the QoS status in each basic service set (BSS) and estimates the potential hidden terminal (HT) effect based on local channel sensing by the STA. The method selects the AP in a manner that reduces the possibility of collision from equal and higher priority HTs, thus providing greater transmission throughput and improving performance.

The invention discloses a multiple-input multiple-output method and a device. The method comprises the steps of: respectively generating a wave beam figuration weight corresponding to each user, respectively generating a reference wave beam figuration weight corresponding to each auxiliary scheduling user according a predetermined regulation, wherein the reference wave beam figuration weight is vertical to a signal space of a main scheduling user and the figuration gain is maximum, determining a channel quality indication corresponding to the auxiliary scheduling user according to the reference wave beam figuration weight corresponding to each auxiliary scheduling user, determining once transmission throughput of the auxiliary scheduling user according to the determined channel quality indication, choosing a reference auxiliary scheduling user to perform second order space division multiplexing with the main scheduling user from the auxiliary scheduling users, and in the event of meeting the preset conditions, performing space division multiplexing on the reference auxiliary scheduling user and the main scheduling user according to the reference wave beam figuration weight of the auxiliary scheduling user and the wave beam figuration weight of the main scheduling user. The throughout in district and the system frequency spectrum efficiency are promoted.

The invention discloses a cocurrent data distribution method based on a transmission control protocol (TCP) in heterogeneous networks, which mainly solves the problems of low end-to-end transmission throughput and larger time delay of a single network in the prior art. The cocurrent data distribution method comprises the following implementation schemes of: 1, defining a distribution network element as a network entity where converging points of multiple heterogeneous networks in front of a server are located; 2, establishing TCP connection between the server and terminal equipment, and initializing parameters related to the TPC connection of each heterogeneous network in the distribution network element; 3, sending data by the server according to a business request of the terminal equipment; 4, sending the data to the terminal equipment according to the state of each heterogeneous network after reaching the distribution network element; 5, after the terminal equipment receives the data, relying ACK (Acknowledgement) information to the server; 6, after the distribution network element receives the ACK information, updating the network parameters; and 7, after the server receives the ACK information, repeating the step 3 to the step 7 till the data are sent completely. The cocurrent data distribution method is applied to cocurrent data transmission of the heterogeneous networks and capable of improving the end-to-end transmission performance.

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.

Wireless communication system and wireless communication method using a wireless channel. A transmitting device changes one of a data bitrate of a video signal and an actual transmission rate of the video signal based on a determination of a maximum transmission throughput of the wireless channel and transmits the video signal over the wireless channel according to the change in the data bitrate or the change in the actual transmission rate. A receiving device receives, temporarily stores, and decodes the video signal transmitted over the wireless channel. Thus, the wireless communication system is capable of maintaining a continuous video display when a discontinuous video signal is transmitted over the wireless channel.

Multi-radio antenna apparatuses and stations for wireless networks including multiple radios coupled to a single transmit / receive antenna, in which the antenna is highly synchronized by an external (e.g., GPS) signal. These multi-radio antenna systems may provide highly resilient links. Synchronization may allow these apparatuses to organically scale the transmission throughput while preventing data loss. The single transmit / receive antenna may have a single dish or a compound (e.g., a single pair of separate transmitting and receiving dishes) and connections for two or more radios.

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.

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.