65results about How to "Efficient multiplexing" patented technology

Access control based on CSMA is favorably carried out with the RTS/CTS method used together. If the RTS/CTS procedure is used together, CTS information is transmitted in response to the reception of RTS information, and data is transmitted in response to the reception of CTS. The CTS transmitting station measures the quality of RTS receive signal, and thereby determines a transmission rate at which it can receive and notifies a station as the destination of CTS. The station as the destination of CTS transmits data in response to CTS information. As the transmission rate for this data, the transmission rate indicated in the RATE field in CTS is applied.

Photonic structures and methods of operating the photonic structures are disclosed. In one embodiment, the photonic structure includes a detector configured to detect radiation of a first wavelength range. The radiation of the first wavelength range is received from an external radiation guide, and the detector is substantially transparent to radiation of a second wavelength range that differs from the first wavelength range. The photonic structure further includes a coupling structure configured to free space couple out of the photonic structure radiation of the second wavelength range. The photonic structure further includes a guiding structure configured to optically guide the radiation of the second wavelength range through the detector.

Method and systems provide improved cell handling in microfluidic systems and devices using lateral cell trapping and methods of fabrication of the same that allow for selective low voltage electroporation and electrofusion.

Methods (700, 900) and nodes (110, 120) for transmission of broadcast information, over at least one antenna port, in a subframe, which transmission is received by a receiver (110) in a wireless communication system (100). The broadcast information is transmitted over a set of antenna ports comprising at least one antenna port, in at least one subframe (300) comprising a set of time-frequency resources, wherein a cell-specific reference signal, CRS, is not transmitted in each subframe (300). The method (700) comprises defining (701) a set of antenna ports for the set of time-frequency resources. Also, the method (700) comprises transmitting (702) the broadcast information on the defined (701) set of antenna ports, thereby using said set of time-frequency resources exclusively, such that they are unused for any other antenna port.

The invention discloses a composite modulation system compatible with medium-wave analogue amplitude modulation (AM) broadcast. According to the system, a low-sideband m-ary position phase keying (MPPSK) signal with modulated high-speed data is adopted to replace a sinusoidal carrier; carrier-retained double sideband amplitude modulation is performed with an analogue audio signal; after a receiver performs up-conversion and impacting filter on the received composite modulation signal and extracts a coherent carrier to multiply, an analogue audio signal is separated by using spectral distribution difference, and MPPSK modulated data is demodulated by using correlation matching. According to the system, the frequency resource and the 9 kHz bandwidth division of the conventional medium-wave amplitude modulation broadcast band, the infrastructures of an amplitude modulation broadcast transmitter, the broadcast system of DSB-AM (Double Sideband Amplitude Modulation) transmission and a mature product of a medium-wave amplitude modulation radio are directly used to realize that the original analogue sound signal and a new digital code stream are really broadcast at the same bandwidth on the same channel at the same time, so that the spectrum utilization efficiency and the energy utilization rate of the digital AM broadcast system are greatly improved.

The present application relates to a method in which a terminal performs channel interleaving in a multi-antenna wireless communication system. More particularly, the method comprises the following steps: constructing both channel quality indicator (CQI) information and coded data information into preset bit-wide vectors to generate a first interleaver input vector sequence; repeating both rank indicator (RI) information and acknowledgement/negative acknowledgement (ACK/NACK) information per the number (N_L) of transmission layers to generate a second interleaver input vector sequence of preset bit-wide vectors and a third interleaver input vector sequence of preset bit-wide vectors; mapping the first interleaver input vector sequence, the second interleaver input vector sequence, and the third interleaver input vector sequence to an interleaver matrix, respectively; and reading the interleaver matrix by a column basis to generate an output vector sequence. The preset bit-wide is defined by the product of a modulation order (Q^p_m) and the number (N_L) of transmission layers.

The invention belongs to the technical field of an ad-hoc network in the field of communication and discloses a broadband ad-hoc network time slot resource dynamic allocation method based on a multilevel frame structure. The method comprises the steps that A1, a TDMA star network which takes a master node as a center is established; A2, the master node establishes a three-level frame structure andsends broadcast information to sub-nodes; A3, the sub-nodes receive the broadcast information and then enter silent receiving states until the sub-nodes have to-be-sent business; A4, the sub-nodes send time slot request frames to the master node; A5, the master node receives the time slot request frames sent by the sub-nodes and allocates time slots to new requests of the sub-nodes through utilization of an online time slot allocation mechanism; A6, the master node broadcasts a time slot allocation scheme in a next superframe; and A7, the sub-nodes receive and analyze the time slot allocationscheme. The method provided by the invention is characterized by high whole network resource utilization rate and low online operation complexity and is particularly applicable to a broadband ad-hocnetwork application with a high QoS demand.

The invention discloses a code-block-based low storage coder in JPEG2000 standard and the coding method thereof. The encoder comprises a wavelet transform module, an address mapping module, wavelet coefficient storing regions, an arbitration module for a code-block to be coded and a bit planar coding module. The wavelet transform module performs multi-level wavelet transform on an original image; the address mapping module maps a transform coefficient corresponding to the address of a wavelet decomposed image to an address stored in a specific wavelet coefficient storing region; the wavelet coefficient storing regions store wavelet coefficients calculated by the wavelet transform module; arbitration module for a code-block to be coded temporarily stores the code-block information not processed subsequently, and prepares the wavelet coefficients in a completely stored code-block for bit planar coding; the bit planar coding module codes and updates the coding state variables. The invention has the advantages of good image compression quality and small system occupancy storage capacity, and can be used for image compression coding for various digital equipments, especially for compression systems of high resolution images.

An illuminating device includes: a light guide bar having a quadrangular prism configuration, formed of a transparent material, and having an optical path converting means provided on two opposite side surfaces thereof and a light source assembly composed of a plurality of point light sources and disposed at one of the two side surfaces of the light guide bar, wherein the point light sources are arrayed along the longitudinal direction of the light guide bar with their light emitting surfaces facing the one side surface of the light guide bar. Lights from the point light sources are introduced into the light guide bar from the one side surface, propagate through the light guide bar, and exit out from one end surface of the light guide bar. Also provided is an image display apparatus which includes the above-described illuminating device, a light modulating means, and a projection optical system.

The invention provides a method and system for parallel square crossing network data collection. The method comprises the steps that S1 a collection method is determined, and S2 tasks are updated at regular time, wherein if a common URL list collection method is determined, data and metadata of a webpage to be downloaded are directly downloaded according to a URL list, and if a square crossing collection method is determined, a webpage to be downloaded is searched by utilizing a crossing keyword list, and data and metadata of the webpage is downloaded. Scanning inspection is carried out on all webpages from the first layer to the current layer in a downloaded webpage, and when the last modification time of a newly downloaded webpage is later than the last modification time of a downloaded webpage, data collection is carried out on the newly downloaded webpage, and webpage data records are updated. By means of the method and system for parallel square crossing network data collection, potential risks and cost in the multithreading technology are avoided, potential risks and cost in multithreading parallel collection are lowered, parallel collection of mass data can be carried out more stably and more efficiently, and data reading and inquiring efficiency is improved.

A method and apparatus for multiplexing frequency hopping in a wireless communication system using Orthogonal Frequency Division Multiple Access (OFDMA) is provided. The frequency hopping multiplexing method and apparatus efficiently indicates time division multiplexing for global hopping and local hopping by indicating and using the number and positions of slots for global hopping and local hopping to time-division-multiplex global hopping and local hopping in a reverse link, depending on information the number of Distributed Resource CHannels (DRCHs), provided from a transmitting side over a Forward link Secondary Broadcast Control CHannel (F-SBCCH), which is one of the forward common channels.

A base station of a wireless communication is disclosed. A wireless communication base station comprises a communication module and a processor. The processor receives DCI of a physical downlink control channel (PDCCH) for scheduling a physical uplink shared channel (PUSCH) transmission over a plurality of slots and multiplexes hybrid automatic repeat request (HARQ)-ACK information to the PUSCH transmission by applying a value in a downlink assignment index (DAI) field of the DCI to each slot where the HARQ-ACK information is multiplexed to the PUSCH transmission over the plurality of slots.

A terminal (102), configured with configured grant resource is provided, wherein the terminal (102) is adapted to transmit limited control information in the configured grant resource. A network device (101) is provided, wherein the network device (101) is adapted to configure a terminal (102) to transmit limited control information in a configured grant resource.

A multi-channel statistical multiplexing system which includes a plurality of statistical multiplexing units each for encoding a plurality of channels of video data and then mutiplexing the encoded data to generate mutiplexed data, and a multiplexing unit for further multiplexing the multiplexed data from the plurality of statistical multiplexing units.

The invention discloses a multicast control method of an optical switch array based on a Benes structure. By utilizing the characteristic that a 2 * 2MZI optical switch has the function of adjusting the control voltage of the 2 * 2MZI optical switch so as to control light splitting output of signals at two output ports, in an N * N Benes optical switch array constructed by taking the 2 * 2MZI optical switch as a basic unit, the internal resource overhead is reduced; And routing distribution of multicast signals and calculation of control voltage of each optical switch are completed, and finally the output of equal power of each multicast signal routing request at a destination port is realized. The method can realize multicast and broadcast exchange functions of signals in a Benes optical exchange network, and provides an effective solution for solving the problem of multicast and broadcast communication of optical signals in the field of all-optical communication.

The invention discloses a part CAD (Computer-Aided Design) model reusing method based on a point cloud classification network. A retrieval problem of a three-dimensional part CAD model is converted into a classification problem of a three-dimensional point cloud model. A classification network and a retrieval network are established by taking a PointNet network as a framework, and a residual blockstructure of a ResNet network is introduced into the retrieval network, so that the recognition precision of high-similarity parts is improved. A three-dimensional part CAD model library for small-batch customized products is established, the three-dimensional part CAD model library is preprocessed to obtain a training data set, the part point cloud model is input into the classification networkand the retrieval network corresponding to the part category in sequence, and retrieving is performed to obtain the most similar part model. According to the method, three-dimensional space information of the part CAD model can be better captured, rapid and accurate recognition of the part CAD model is achieved, and then the processes of design, process planning, manufacturing, assembling and thelike of small-batch customized parts of an enterprise are accelerated.

A Direct Sequence Spread Spectrum (DSSS) receiver system (100) combines and orders the soft symbols from associated information channels. The system permits a QPSK channel to be demodulated as a pair of BPSK channels, and the soft symbols of the demodulated BPSK channels to be multiplexed into a single information channel. The receiver system (100) includes a plurality of demodulating fingers (102–106). Each demodulating finger accepts modulation parameters and a sample stream, while supplying soft symbols with indexing information so that information channels can be subsequently multiplexed into a single information channel. A method for ordering the soft symbols of associated information channels in a DSSS system is also provided.