69results about How to "Reduce bandwidth" patented technology

A system for location based services utilizing a mobile device includes a software module configured to operate in a background mode on the mobile device. The software module is further configured to determine a geographical location of the mobile device and transmit the geographical location at predetermined intervals. A services platform is in communication with the mobile device for receiving the geographical location. The services platform includes at least one location based service module for facilitating at least one location based service on the mobile device. A plurality of back end databases is in communication with the services platform where the services platform integrates data from the back end databases with data from a location database. A secure website is included where an owner of the mobile device can view the geographical location of the mobile device and geographical locations of other mobile devices and have the ability to view friends / family / business associates on their mobile device.

A method and apparatus for adaptively obtaining bandwidth requests in a broadband wireless communication system. The method and apparatus includes dynamically varying technique combinations enabling a plurality of users to efficiently request bandwidth from a shared base station. A user may “piggyback” a new bandwidth request upon, or set a “poll-me bit” within, presently allocated bandwidth. A base station may poll users, individually or in groups, by allocating unrequested bandwidth for new requests. Polling may respond to a “poll-me bit,” and / or it may be adaptively periodic at a rate based on communication status parameters, such as recent communication activity and connection QoS levels. Group polling permits a possibility of collisions. Polling policies may be established for dynamically varying user groups, or may be determined for each user. Dynamic selection of appropriate polling techniques makes use of efficiency benefits associated with each technique.

An optical, multi-channel, Differential Phase Shift Keying (DPSK) receiver demodulates multiple Wavelength Division Multiplexed (WDM) channels using at least one interferometer. This distributes expense of the interferometer(s) over all channels of an optical signal, allowing for deployment of cost-effective, scalable, wideband, WDM DPSK systems. For example, for an 80 channel WDM link, the receiver uses a single interferometer instead of eighty interferometers and associated stabilization hardware, dramatically reducing size, weight, power, and cost. The receiver is architecturally compatible with existing interferometer technologies so previous development and qualification efforts can be leveraged. This allows for expedited technology insertion into existing optical communications networks, including terrestrial and space-based optical networks.

A motion estimation device executes motion estimation for a macroblock in a current picture, using pixel data of a reference picture in a multi-frame memory (504), including the following elements. A local memory (702) holds a part of the pixel data. The part is in a first range from which motion is estimated in first motion estimation, and read out from the multi-frame memory (504). A common motion estimation unit (704) executes the first motion estimation using pixel data in the part held in the local memory (702). A direct motion estimation unit (108) executes the second motion estimation using pixel data in the pixel data of the reference picture by an algorithm different from that of the first motion estimation. The pixel data used by the direct motion estimation unit (108) is included in a second range which includes the first range and is larger than the first range.

The invention discloses a data distribution system based on a CDN (content distribution network). The data distribution system comprises an access layer device, one or more relay layer devices and one or more margin layer distribution devices, wherein the access layer device is suitable for receiving a broadcasting data packet from a broadcasting source and converting the broadcasting data packet to a transmission data packet of a predetermined format; each relay layer device is suitable for performing relay transmission on the transmission data packet of the predetermined format converted by the access layer device through a uniform transmission protocol; each margin layer distribution device is suitable for receiving the transmission data packet of the predetermined format after relay transmission performed by each relay layer device and converting the transmission data packet of the predetermined format to a data packet of a terminal broadcasting protocol according to a terminal request and distributing the data packet to the terminal. The invention also provides a data distribution method based on the CDN. By utilizing the data distribution system and the data distribution method, the reliability of live stream can be greatly improved, and the transmission efficiency among backbone networks also can be greatly improved.

A system and method are provided for sorting IP routing table entries in a TCAM for longest IP prefix matching LPM of destination IP addresses. The IP routing table is divided into logical blocks, for each block an associated routing entry IP prefix length. Each block is of a respective size whose proportion of the total size of the routing table is determined by the associated IP prefix length. The blocks are ordered so that the TCAM returns an LPM when queried. Starting block sizes can be initialized to proportions which reflect actual expected numbers by proportion of routing entries by IP prefix length. The blocks also grow and shrink as entries are added and deleted so as to more closely mirror real-world populations of expected entries having the IP prefix length in question.

The embodiment of the invention provides a data sending method, which comprises the following steps of: determining total delay time required for totally transmitting message on each sub-link in an aggregation link to an opposite end; and selecting a sub-link according to the total delay time of the sub-links, and distributing the message to be distributed to the sub-link to perform transmission. The embodiment of the invention can effectively realize order preservation of message transmission and load balance of the sub-links, and improve the transmission efficiency. Moreover, the embodiment of the invention also provides a data sending device.

The embodiment of the invention discloses a URL merging processing method and device. The method comprises the steps that a URL set corresponding to a target website is obtained; structure splitting is conducted on URLs in the URL set according to composition specifications of the URLs to generate a characteristic set corresponding to the URLs; generalization identifiers in structure identifiers are obtained according to data characteristics of structure values corresponding to the structure identifiers contained in the characteristic set; merging processing is conducted on the URLs in the URL set according to the generalization identifiers to generate at least one URL merging cluster. According to the technical scheme, the URL merging processing method and device can achieve the technical effect of merging the URLs corresponding to web pages with the similar structures, bandwidth is greatly decreased, storage consumption is greatly reduced, and a more simple, convenient and rapid mode is provided for sorting and merging technologies of the web pages.

The invention discloses a time shifting optimization method and system based on the HLS protocol, and relates to the field of Internet multimedia. The method includes the following steps: starting from a preset time point, with a media segment time length with a fixed length as a fragment length, counting a fragment sequence ID of each streaming media fragment; storing all streaming media fragments within a time shifting range, grouping the streaming media fragments, dividing every continuous N streaming media fragments into one group, wherein each group of streaming media fragments forms a time shifting index file; causing an HLS live broadcast program into a time shifting state by a client via a broadcast control operation, adding time shifting additional information on the address of the live broadcast index file, and sending the time shifting index file to an HTTP streaming media server; analyzing, by the HTTP streaming media server, the time shifting additional information, and sending the corresponding time shifting index file to the client; and requesting and playing, by the client, the received streaming media fragments. By adoption of the time shifting optimization methodand system, the bandwidth and time consumed by the transmission of the time shifting index file are reduced, which is conducive to improving the playing speed.

Systems and methods for hierarchical blurring of texture maps are described herein. An embodiment includes determining a region where a texture is partially mapped to a 3D surface and populating an unmapped portion of the determined region with compressible low frequency data. A system embodiment includes a region determiner to determine a region of interest in an image and a blurring engine to populate an unmapped portion of determined region with compressible low frequency data. In this way, when a texture is partially mapped to the 3D model's surface, leaving the rest unused, embodiments of the invention save bandwidth by padding an unmapped region with compressible low frequency information. Furthermore, embodiments avoid contaminating a rendered 3D model with unwanted colors which bleed in when unmapped pixels are averaged in with mapped pixels.

A display system, a source driving apparatus, and a method of black insertion are provided. The apparatus includes a data channel, a black-insertion-data line, a first and a second selector. In a first period, the first selector electrically connects the data channel to a first data line in a display panel, and the second selector electrically connects the black-insertion-data line to a second data line in the display panel. In a second period, the first selector electrically connects the data channel to the second data line, and the second selector electrically connects the black-insertion-data line to the first data line.

According to one embodiment, a hardware-based processing node of a plurality of hardware-based processing nodes in an object memory fabric can comprise a memory module storing and managing a plurality of memory objects in a hierarchy of the object memory fabric. Each memory object can be created natively within the memory module, accessed using a single memory reference instruction without Input / Output (I / O) instructions, and managed by the memory module at a single memory layer. The object memory fabric can distribute and track the memory objects across the hierarchy of the object memory fabric and the plurality of hardware-based processing nodes on a per-object basis. Distributing the memory objects across the hierarchy of the object memory fabric and the plurality of hardware-based processing nodes can comprise storing, on a per-object basis, each memory object on two or more nodes of the plurality of hardware-based processing nodes of the object memory fabric.

The invention provides a logical server which comprises a judgment unit, a search unit and an information feedback unit. The judgment unit is used for sending an acquisition request to an account number server and judging whether a request account number belongs to the administering scope of the logic server or not according to returned account number data, wherein the account number server is used for keeping a node number and the administered account number data of each server. The search unit is used for searching the corresponding logic server and returning the corresponding node number to the request account number when the request account number does not belong to the administering scope. The information feedback unit is used for obtaining associated information and feeds back the information into the request account number by the aid of a data server after successful login, wherein the data server is used for keeping information associated to each account number. The invention further provides an instant messaging system and an instant messaging method. By the aid of the technical scheme, a specific design frame is adopted, so that data transmission speed can be increased, data transmission reliability can be improved, cost can be saved, and the demands of instant messaging on supporting a great number of users are met.

The invention discloses a DNA sequence k-mer frequency statistical method based on MapReduce. The method includes the steps that a sequence file to be processed is preprocessed in a distributed cluster environment in which a MapReduce calculation model is run, and an error sequence is removed; the processed sequence file is subjected to hash processing and then serves as the input of a Map function, and all k-mer frequencies in the k variation range are computed through the Map function by utilizing a defined algorithm and then serve as the input of a Combine function; obtained intermediate results are locally merged through the Combine function and then serve as the input of a Reduce function; key value pairs with the same key sent by all Combine nodes are merged by Reduce, and final results are input. The method has the advantages of effectively processing a large-scale sequence data set, reducing the processing device performance requirement, solving the problem of large total processing time consumption of I / O overhead in the prior art, and significantly increasing the processing speed.

A method and apparatus for compressing data in a communication system by receiving uncompressed packet at a compressor of the communication system, segmenting the packet into a plurality of packet segments, estimating packet segment compression parameters for each of the plurality of packet segments and compressing the packet segments utilizing one or more of the estimated packet segment compression parameters that are estimated and adjusted based upon the signal characteristics of the uncompressed packet and a desired compression ratio.

The embodiment of the invention provides a method and system for dispatching of video resource point-to-point sharing and a note terminal. The method comprises the steps that for a video file needing to be downloaded, a request is sent to a service balancer, and the address of a proxy server and the address of a hole punching server are obtained; according to the address of the proxy server and the address of the hole punching server, data connection between the node terminal and the proxy server and between the node terminal and the hole punching server is established; the proxy server is requested for a resource list of the video file, and an inquiry result fed back by the proxy server is obtained; according to the inquiry result, connection is established between the hole punching server and the other node terminal in the inquiry result, and loading data of the video file are obtained from the other node terminal. Data connection between the proxy server and the hole punching server can be established, and therefore rapid and balanced dispatching policy can be provided, and data resource sharing between the node terminals is achieved.

The present invention discloses a method for compressing and decompressing pixel data and the device thereof. The method comprises receiving current pixel data from a preprocessor and comparing the current pixel data with predictor pixel data to obtain a section index from a quantization table. Output the section index to a memory as compressed data. Then, receive the compressed data from the memory. Use the quantization table to look up a representative level corresponding to the compressed data and output decompressed pixel data based on the representative level to an image processing unit. The device mentioned above comprises a memory, a compressor and a decompressor. The memory stores compressed data. The compressor quantizes and compresses pixel data and outputs the compressed pixel data to the memory. The decompressor receives the compressed pixel data and decompresses the compressed pixel data and outputs the decompressed pixel data as pixel data.

The invention relates to a method for reducing ICI in an OFDM system by utilizing precode transmission. Because of the time variability of an actual channel and the phase noise between a sender and a receiver, frequency departure is possibly caused, the departure of the carrier frequency can cause the damage to the orthogonality among sub carriers, therefore inter carrier interference (ICI) is generated. Through predetermining the demodulation algorithm of the receiving terminal, the invention adopts a zero forcing principle to construct a modulation matrix M, a sending signal is preprocessed through the modulation matrix, the channel influence is counteracted in advance at the sending terminal, therefore the effect of reducing the ICI is achieved. By adopting the method of the invention, not only bit error rate is greatly improved, but also the complexity of the OFDM system receiver is reduced, thereby the invention is especially suitable for the down chain of a TDD system.

A method and system for providing electronic option trading bandwidth reduction and risk management and assessment for multi-market electronic trading. Data streams including electronic option trading information are split into plural individual data streams by a server network device and / or one or more network interface cards (NICs). The individual data streams are made available to target network devices using less network bandwidth and fewer processing cycles that would be required to process the whole data including the electronic option trading information. The option trading risk assessment and management information includes an “integrated viewpoint” that aggregates an option trader's activities across all their electronic option trading accounts, their current and historical option trades and option trade locations on all option trading exchanges.

The embodiment of the invention provides an Internet of Things gateway and a method for accessing Internet of Things equipment to the gateway. The Internet of Things gateway comprises at least one communication module, a memory and a processor, and each communication module and each memory are respectively connected with the processor; the memory is used for storing one or more computer instructions, and when the one or more computer instructions are executed by the processor, the following steps are implemented: establishing wireless network connection between the Internet of Things equipmentand the corresponding communication module, carrying out adaptation operation of a wireless communication protocol in a mode of packaging a corresponding protocol gateway software model on the basisof the communication module, and accessing the Internet of Things equipment supporting the wireless communication protocol to the Internet of Things gateway. The Internet of Things equipment adoptingdifferent communication protocols can be accessed to the same Internet of Things gateway; the control of the Internet of Things equipment is not influenced by the communication protocol adopted by theInternet of Things equipment, so that the use of the Internet of Things equipment is not limited.

The invention provides a data transmission method, data transmission equipment and a data transmission system. Transmitting-end equipment transmits M SCTP (stream control transmission protocol) reports to receiving-end equipment, each of the M SCTP reports carries the value of transmission times to lead the receiving-end equipment to obtain the total number M of the SCTP reports by computation according to the value of the transmission times carried in the received N SCTP reports, so that the problem of unnecessary repeated retransmission of lost data blocks due to incapability of accurately knowing transmission quality of a transmission network in the prior art can be avoided to a certain degree, and further, network bandwidth and performance expenditure are reduced, and network resources are saved.

To simulate the effect of shadows in an image being rendered a light source bounding frustum is produced for a tile for a light source, and used to determine a set of geometry for the tile that could cast a shadow in the tile. The determined set of geometry is then used to determine a light source visibility parameter for each sampling position in the tile by determining for each tile screen space sampling position, whether rays cast between the tile sampling position and a set of sampling positions representing the light source would intersect occluding geometry or not. The determined number of visible light source sampling positions for each tile sampling position is used to determine a light source visibility parameter value for each tile sampling position, and the determined light source visibility parameters are then used to modulate the light source when shading the geometry.

The invention discloses a WebSocket based on active message pushing system, and relates to the technical field of data communication. The system includes two parts: a client SDK and a message push server. After the message push server is set up, the client implements a WebSocket-based active message push system by using a packaged SDK. When the client needs the server to push a service message, the client firstly subscribes to the service message by calling the client SDK from any non-special port N(N) 1023) to a subscription monitoring port A(A) 1023) of the message push server; the message push server receives a subscription request, the message is sent to a receiving port N+1 of the client from a push port B (b)1023) through the WebSocket. The method implements theactive message push system, establishes a WebSocket connection to interact with the server to implement active real-time message push, improves the communication efficiency, and reduces bandwidth resources.

The present invention provides systems and methods for providing on-demand datacasting. A system according to an exemplary embodiment of the present invention comprises a rate generator for controlling the rate at which data signals are combined with audio / video signals. The system may also include a system controller for controlling the rate of the rate generator. The system controller may also monitor the complexity of the audio / video signals, calculate an average complexity of the audio / video signals, calculate an average complexity of the audio / video signals and determine whether the average complexity is greater than the typical complexity of audio / video signals. The system controller may adjust the rate of the rate generator based on the determination of whether the average complexity of the audio / video signals is greater than the typical complexity of audio / video signals.

The invention relates to an on-line fault distance measurement method for a high-voltage cable, and the method comprises the steps: (1) collecting transient traveling wave current signals at the head and tail ends of a cable; (2) enabling the current signals obtained at step (1) to be converted into independent analog current signals i1-i6 through phase-mode transformation; (3) selecting the analog current signal i4 at step (2) for wavelet packet decomposition, solving an energy ratio of all frequency bands through employing a wavelet packet decomposition coefficient, then extracting the frequency band with the high energy ratio, and reconfiguring a transient traveling wave; (4) carrying out the wavelet analysis of the configured transient traveling wave at step (3), and determining the time t1 and T1 when the configured transient traveling wave arrives at the head and tail ends of the cable; (5) judging a fault region according to the time t1 and T1 at step (4), and solving a geographic distance from a fault point to the head end of the cable. Compared with the prior art, the method is high in distance measurement precision, and is few in interference.

The invention provides an acquisition and control system for electricity utilization information of electricity consumers. The acquisition and control system comprises loading control devices, electricity quality monitoring devices, control switches and electricity meters which are arranged at various electricity consumer ends, as well as an electric loading monitoring center arranged at the remote end, wherein each loading control device is provided with a first GPRS communication module; the loading control devices are in communication with the electric loading monitoring center via a GPRS network through the first GPRS communication modules; each loading control device is in electric connection with the corresponding control switch and a signal of the corresponding electricity meter. The control system has the structural characteristics that each loading control device is in electric connection with a serial communication port signal of the corresponding electricity quality monitoring device; the electricity quality monitoring device and the corresponding loading control device at the same electricity consumer end share a communication link, or the electricity quality monitoring device is controlled by the corresponding loading control device to be in communication with the electric loading monitoring center. The control system can reduce the communication operation cost of an electricity supply department, and improves accuracy and timeliness when electricity failure or electricity limitation is carried out during abnormal electricity utilization.

The invention relates to a charging pile, an upgrading method and a device of a charging pile group, a controller and a medium. The upgrading method of the charging pile group comprises the followingsteps: step 1, one or more charging piles in the charging pile group receiving upgrading information; step 2, upgrading the charging pile according to the received upgrading information, and updatingthe upgrading information after the upgrading is completed; step 3, the charging pile after upgrading sending the updated upgrading information of the charging pile to one or more other charging piles; step 4, upgrading the other charging piles according to the received upgrading information, and updating the upgrading information after the upgrading is completed; circulatory execution from step 3To step 4, until all upgradable charging piles in the charging pile group are upgraded. The invention has the advantages of low cost, high efficiency, stability and reliability for upgrading the charging pile group.

The invention relates to frequency-band-sharing navigation accompanying multiplexing signals, and an intelligent despreading demodulation method and a device used thereby. The method specifically includes the following steps: generating a parasitized signal telegraph text and a parasitic navigation timing telegraph text; modulating parasitized signals and parasitic signals to an intermediate frequency or a radio frequency; and carrying out power control on the parasitic signals, and the like. The intelligent despreading demodulation device includes a parasitic signal generation module, a positioning stamp signal generation module and an intermediate frequency or radio frequency combiner module and the like. Beneficial effects of the method and the device are that the method which realizes pseudo-range measurement and positioning through accompanying navigation positioning signals on a communication broadcast channel uses a pseudo random-code spectrum-spread technology and uses spectrum spread gain to compensate for a condition of low-power parasitism of the accompanying navigation positioning signals. On the premise that parasitized communication broadcast signals are not affected, pseudo distance measurement and positioning can be realized through use of the accompanying navigation positioning signals; and the accompanying navigation positioning signals of pseudo code spectrum spread is elusive and interference resisting.