68results about How to "Improve coverage quality" patented technology

The invention relates to a communication switching method among different networks, which comprises the following steps of: sending a request for establishing a second link to a core network by a terminal through an access control device of a second network; and after completing the establishment of the second link, sending a request for releasing a first link to the terminal by the core network through an access control device in a first network. The invention has the advantages of providing and solving the technical problem of the processing of seamless switching of a multi-mode terminal between a WLAN (Wirele Local Area Network) network and a mobile wireless network in the prior art, and guarantees service quality and service experience of users during roaming. The invention provides a novel implementation system and method according to international standards of 3GPP (The 3rd Generation Partnership Project), 3GPP2, RFC (Request for Comments) and the like, which have easy implementation and capability of scale commercial popularization.

A method for forming a capacitor insulation film includes the step of depositing a monoatomic film made of a metal by supplying a metal source including the metal and no oxygen, and depositing a metal oxide film including the metal by using a CVD technique. The method provides the metal oxide film having higher film properties with a higher throughput.

In a method and apparatus for acquisition and evaluation of image data of an examination subject that are to be created with at least one imaging medical imaging apparatus, generation of a whole-body overview image of the examination subject is generated and selection of an anatomical region in the whole-body overview image is selected. A point in the selected anatomical region is established that forms the origin of a whole-body coordinate system relating to the examination subject, and establishment of an associated, subject-related coordinate system is established / Upon a later examination with a medical imaging apparatus, a whole-body overview image and / or a partial image containing the origin and / or another marker point is / are generated, and examination (diagnostic) images of the examination subject (S3), are generated. Using new whole-body overview images and / or the partial image, the examination images and spatially arranged in the original whole-body coordinate system dependent on a comparison of at least one item of image information of the examination image with at least one item of image information of the whole-body overview image and / or at least one item of information of the partial image that is related to the whole-body coordinate system.

The invention discloses a method and a device for repairing and enhancing the cover performance of a wireless sensor network, which relate to the field of wireless sensor networks. The method comprises steps: the optimal cover node set in the wireless sensor network is acquired based on an optimal node selection method for an irregular sensing region; according to attributes of each sensor node in the optimal cover node set and the sensing irregularity, the minimal connected cover set in the wireless sensor network is built; and based on the minimal connected cover set, a cover repairing and enhancing method based on connection is used for repairing a cover blind area and a redundant cover area in the wireless sensor network, and the cover performance of the wireless sensor network is improved. Energy is considered as a main factor, cover repairing is carried out based on signal transmission irregularity, sensing range irregularity of nodes in the network and cover connection in the network, and the purposes of saving the network energy, improving the network cover quality and prolong the effective service life of the network are achieved.

The invention provides a novel mobile communication base station which comprises a chassis bearing system, a machine room and a mast system, wherein the chassis bearing system comprises a rack for bearing the machine room, and wheels and folding legs which are installed on the rack; the folding legs are hinged with the rack and are connected with a drive motor; the drive motor controls the folding legs to unfold or fold; the machine room is fixed on the rack and comprises a working cabin, an oil engine cabin for putting an oil engine and a mast cabin for containing a mast; the mast system comprises the mast, an antenna, a microwave pan-tilt and a lightning rod fixed at the top of the mast; the antenna is connected with the mast by an antenna fixing device; the microwave pan-tilt is connected with a console in the working cabin by signal wires; a feeder tray for containing the signal wires is arranged in the mast cabin; and the mast is an electric lifting mast. The base station has the advantage of quick and economical station building under the condition of ensuring the communication quality.

The invention discloses a limit parameter adjusted multimode multi-target LTE base station antenna optimization method which is characterized by comprising the following steps that (1) optimization target information, the number of threads, the number of iterations, the number of adjusting cells and the number of antenna parameter changes are set; (2) frequency sweep information of an optimization area is acquired; (3) the frequency sweep information is preprocessed according to the optimization target information; (4) the initial network coverage quality index of the optimization area is calculated; (5) the corresponding thread is developed according to the set number of threads, and the optimization scheme of each thread is calculated; and (6) the optimization schemes of all the threads are compared and the best optimization scheme is selected through screening. The method is simple in steps and convenient to operate and can efficiently and accurately optimize the base station antenna parameters so that the network coverage quality of the area of poor coverage quality can be improved and the method is suitable for popularization and application.

The invention discloses a low-power wide area network planning method based on data mining, which obtains measured data of a low-power wide area network, starts from a covering target to comprehensively consider an influencing factor of weak coverage of the network, uses an improved regression tree algorithm to establish a signal quality prediction model for extracting the covering distribution space mode of the network; then, the selection of the base station position is treated as a weighted problem based on the covering distribution space mode to be processed; a weighted K-centroids clustering algorithm is used for obtaining optimal base station deployment adapting to the current mode; finally, the final base station topology is obtained according to determination of a general objectivefunction. The low-power wide area network planning method based on data mining in the invention can improve the covering quality of the low-power wide area network well; and a certain reference valueis achieved for network planning.

Four independent technologies are incorporated in this invention to efficiently and cost effectively implement dynamic last mile connectivity. The four technologies are passive optical networks (PON), Small cell, wavefront multiplexing (or K-muxing), and digital beam forming (DBF). We have filed US patents for communications architectures featuring K-muxing overlaid over low cost of PON. Those inventions relate particularly to resource allocation in passive optical networks (PON) via wavefront multiplexing (WF-muxing or K-muxing) and wavefront demultiplexing (WF-demuxing or K-demuxing). The “WF-muxing in PON” can be configured for performing remote digital beam forming (RDBF) over a service area covered by multiple small cells. The RDBF may generate multiple shaped beams with enhanced connectivity and better isolations over a same frequency slot concurrently to serve multiple users over the coverage area.

The invention relates to a wireless network coverage blind area sensing method and system. According to the method, an analysis area and an analysis period are selected and a wireless network signal data sample set collected from a mobile terminal is received. The method is characterized in comprising the following steps of carrying out data washing and sorting on a data set collected in the analysis period; determining a value range of the seed number and taking the value range of the seed number as a control parameter for outer layer circulation of clustering analysis; selecting k initial clustering centers as seeds in a test target analysis area; on the basis of the determined seed number k and the selected k seeds, carrying out inner layer iteration through adoption of a k-means method, changing a value of the seed number k according to the determined value range of the seed number, repeating a process of calculating and selecting the seeds until all seed number is iterated completely; and determining a final output result. According to the method and the system, a coverage blind area of the mobile terminal can be timely and accurately discovered, and a blind area position, a range and the serious degree are calibrated.

The invention discloses a greedy algorithm-based video sensor network multi-mobile target monitoring and optimizing method. A mobile monitoring node collection is built, the coverage quality of the multiple mobile targets at the moment is calculated according to the number of video sensor nodes covering each mobile target, a method of linearly predicting the position of the mobile target at the next moment is then designed, and thus the monitoring node collection is determined. The target information covered by each monitoring node is broadcast to the rest monitoring nodes in the communication range so as to maintain a coverage rotation angle table, the monitoring nodes are finally decided on the basis of greedy algorithm, the monitoring nodes rotate according to the coverage rotation angle table, and the rotated angles altogether are counted. According to the greedy algorithm-based video sensor network multi-mobile target monitoring and optimizing method, the coverage quality of the multiple mobile targets can be effectively improved, the demand of real-time coverage can be achieved, the sum of the rotation angles of the video sensor nodes is minimal on the premise of meeting the coverage demands through greedy algorithm, and energy consumption of the video sensor network can be reduced.

The invention discloses a digital operation field management and control system. The digital operation field management and control system consists of a field terminal, a supervision terminal, a management terminal, a client side and an outer-net real-time server and is characterized in that the field terminal, the supervision terminal and the management terminal are communicated with the client side and a server group by signals through a communication base station, a GPS (global position system) navigational satellite and the internet. The digital operation field management and control system can be used for conducting field operation flow image management, remote wireless image in-time sample checking, field geographic position management and field coordinate position guiding, so as to realize 'geographic position+ GPS satellite time+ image' management in the whole process from planning, starting, reaching, working and completing working in the operation field, and hierarchical supervision is really realized through authority control and management.

The embodiment of the invention discloses a method, a device and a system for self-configuration of frequency, which aim at solving the problem that the existing frequency self-configuration technology cannot configure the working frequency for a plurality of common-carrier wave receiving and sending devices in the common-cell scheme. The method comprises the following steps of enabling a base station to obtain the air interface interference value of each frequency of each receiving and sending device which is connected with the base station in the preset frequency list, dividing the receiving and sending devices carrying the same carrier wave into one collection, defining the weighted sum value of the air interface interference values of the frequencies of the receiving and sending devices in the collection as the comprehensive interference value of the frequency in the collection, and configuring the frequency with minimum comprehensive interference value in the collection to each receiving and sending device in the collection to be used as the working frequency for carrying the carrier wave corresponding to the collection. The method has the advantages that the configured frequency has the minimum comprehensive interference value at each common-carrier wave receiving and sending device, the minimum interference of the working frequency of the base station is effectively ensured, and the integral coverage quality is improved.

The invention discloses an isolation filling manufacture method in gallium nitride (GaN)-based high voltage light-emitting diode (LED) manufacture process. The method includes conducting first N type gallium nitride layer etching to form a groove structure and form a first isolation insulation layer in the groove structure after forming the N type gallium nitride layer on a lining, forming a P type gallium nitride layer in the manufacture process of a light-emitting diode tube, conducting second groove etching to form a structure reaching a first isolation insulation layer and forming a second isolation insulation layer above the first isolation insulation layer. The method greatly reduces difficulty of forming an isolation filling structure, provides a smooth climbing structure for metallization interconnection of a follow-up chip electrode, simultaneously improves covering quality of the isolation insulation layer on the lateral face of the groove, and improves reliability and yield of a GaN-based high voltage LED.

The invention discloses a tilt adjustment method for an electric tilt antenna and a corresponding device, and aims at solving the technical problem that in the prior art, tilt adjustment of the electric tilt antenna is not in place due to a structure fit clearance, and then communication signal coverage and user experience are influenced. The method comprises the following steps: whether or not atarget position of a phase shifter push-pull rod is in the positive direction of an initial position is determined, wherein the initial position is the position where the phase shifter push-pull rod stays on a stroke lever before tilt adjustment, the target position is the position where the phase shifter push-pull rod needs to stay on the stroke lever after tilt adjustment, and the positive direction is the direction pointing to the stroke lever destination point from the stroke lever start point; if yes, a motor is controlled to drive the phase shifter push-pull rod to move in the position direction to the target position and then move a structure clearance compensation distance in the negative direction; or the motor is controlled to drive the phase shifter push-pull rod to move in thepositive direction and cross the target position and then move in the negative direction to the target position; and otherwise, the motor is controlled to drive the phase shifter push-pull rod to movein the negative direction to the target position.

The invention provides a method for optimizing regional coverage of a mobile sensor network, which comprises the following steps: establishing a mobile sensor network coverage model, discretizing a mobile sensor network detection area into a plurality of pixel points, and defining the ratio of the number of the pixel points covered by nodes to the total number of the pixel points as a coverage rate; calculating the coverage rate of the initial mobile node by taking improvement of the network coverage rate as an optimization purpose; an using improved longicorn beard search algorithm (IBAS) provided by the invention to take the coverage rate as a fitness function to carry out better search and update the position of the longicorn centroid; calculating fitness values of the left beard and the right beard of the long-horned beetle by improving the step length and selecting the random direction; calculating and reserving a better longicorn centroid position solution through greedy selection; and completing the coverage rate optimization of the wireless sensor network through a node matching algorithm. The longicorn beard search algorithm is improved, so that the coverage effect of themobile sensor network is more uniform, and the coverage rate is better.

A receiving terminal for communication via NGSO satellites comprises an outdoor unit coupled to an indoor unit via optical fibers. The outdoor unit comprises an array antenna for capturing signals from the satellites; low-noise amplifiers; analog-to-digital conversion blocks for converting the captured signals to digital signals; a pre-processor for performing a wavefront multiplexing transform on the digital signals and generating wavefront multiplexed signals; and RF-to-optical drivers for transforming the wavefront multiplexed signals to optical waveforms. The indoor unit comprises optical-to-RF converters for optical demodulating the optical waveforms to recover the wavefront multiplexed signals; a post-processor for performing a wavefront demultiplexing transform on the wavefront multiplexed signals to recover the digital signals, the wavefront demultiplexing transform being an inverse of the wavefront multiplexing transform; a remote digital beam-forming network for generating receive beam signals from the recovered digital signals; and RF demodulators for generating data streams from the receive beam signals.

The invention discloses a coverage hole repair method and system for failed nodes in Internet of Things (IOT). The method comprises the steps that a sink node conducts roll poling for remaining energy Erj of all sensor nodes in a network every T seconds; the sink node determines whether each sensor node is effective or not based on preset conditions; the sink node removes an ineffective sensor node based on determination results, and re-clusters the effective sensor nodes in the network according to the remaining energy Erj and the hill climbing algorithm based on topology potential; and the ineffective sensor node calculates the topology potential (img file shown in the description) between the ineffective sensor node and each redundant sensor node, and selecting the matched redundant sensor node to replace the ineffective sensor node according to the maximum topology potential, the principle of first come first served, or a combination of both. According to the invention, the topology potential is used for re-clustering the effective sensor nodes, the optimal redundant sensor node can be selected in accordance with the magnitude of the topology potential and the principle of first come first served, through a combination of the two above, the network is allowed to gain unified energy distribution and always maintain local redundancy coverage in high-density areas of communication, and the network lifetime is extended while the communication quality of the network is ensured.

The invention discloses a multi-mode access novel EOC device which is a new device further developed on the basis of a conventional point-to-point low frequency modulated EOC device. The multi-mode access novel EOC device comprises a central office end device and a user terminal device connected with the central office end device through a coaxial cable. The central office end device comprises a wireless signal and CATV cable television signal combiner unit, and a wireless signal and CATV cable television combination signal and modulated Ethernet data signal combiner unit. The combination signals of already modulated Ethernet data signals, wireless signals and cable television signals are mixed and then are output through the coaxial cable, multi-service transmission and global management and control can be simultaneously realized, the device is used for simultaneous access of network data signals, the cable television signals and the wireless signals, indoor coverage of the wireless signals is realized, and the functions of networking, TV watching and the like on cable television network broadband are achieved.

The invention discloses access point equipment of a wireless local area network, and the equipment is used for improving the laying flexibility of the access point equipment in the wireless local area network, improving the covering capacity and covering quality and improving the expandability. The access point equipment comprises a grouped data processing module, a radio frequency module and a universal serial bus (USB) transmission module; the grouped data processing module and the radio frequency module are each provided with a USB interface; the USB interface of the grouped data processing module and the USB interface of the radio frequency module are connected with the USB transmission module respectively. A signal processing method is further disclosed.

The invention discloses a coating and method capable of decreasing uncoated areas of a curtain. The coating capable of decreasing the uncoated areas of the curtain comprises separation agents, starch, latex, extension agents, microcapsules, water repellent agents, interfacial agents and pH modifiers. The coating has good extension viscosity, so the operation stability of the curtain is obviously improved; when stretched vigorously at the moment when the coating is in contact with a paper web, the coating can bear certain deformation and cannot break easily, the covering quality of the coating can be easily improved, and the uncoated areas existing on the surface of coated carbonless copy paper are obviously decreased.

Disclosed is a multi-moving-target dynamic monitoring optimization method based on a diploid genetic algorithm in a video sensor network. The method comprises deploying video sensor nodes randomly inside a monitored area; linearly predicting the positions of moving targets at a next moment; providing a process on how to base on the diploid genetic algorithm to schedule toe video sensor nodes to dynamically monitor the moving targets. The multi-moving-target dynamic monitoring optimization method based on the diploid genetic algorithm in the video sensor network can help compute out the required rotating angle of every monitoring node for covering as many as the moving targets, then comprehensively compute an optimal solution through a server and finally inform all the nodes to rotate. The multi-moving-target dynamic monitoring optimization method based on the diploid genetic algorithm in the video sensor network can effectively improves the covering quality of multiple moving targets, dynamically monitor the multiple moving targets and provide possibility for achieving efficient multi-target dynamic monitoring through the diploid genetic algorithm.

The invention relates to a dual-layer material ramp for a machine for producing a dual-layered fibrous web, in particular a dual-layered paper or cardboard web, from two fibrous suspensions, comprising a material ramp nozzle with two nozzle spaces extending along the width and separated from one another on the inside by a separating wedge, said nozzle spaces guiding a respective fibrous suspension during operation of the dual-layer material ramp as fibrous suspension streams and coming together, each of said nozzle spaces comprising an upstream feed device, a downstream outlet gap with a gap width, said gap extending along the width and an outer wall on the outside, wherein the separating wedge comprises two separating wedge surfaces that are contacted by the respective fibrous suspension stream during operation of the dual-layer material ramp. The dual-layer material ramp according to the invention is characterized in that the separating wedge comprises two separating wedge areas, each having a separating wedge angle, an upstream separating wedge starting area and a downstream separating wedge end area, that the two separating wedge angles of the two separating wedge areas assume different angular values, wherein the separating wedge starting angle of the upstream separating wedge starting area assumes a greater angular value than the separating wedge end angle of the downstream separating wedge end area, and that a non-planar transition area is provided between at least one separating wedge surface of the separating wedge between the two separating wedge areas of the separating wedge.

The invention discloses a design method of an indoor distribution system. The method comprises: obtaining a three-dimensional view of an internal structure of a target building; processing the three-dimensional view to obtain a line graph of the three-dimensional view; using augmented-reality equipment to superimpose the line graph onto an reality image of the target building to obtain a superimposing graph; and adding virtual models of components of the indoor distribution system in the target building into the superimposing graph according to preset design conditions to obtain a design scheme of the indoor distribution system of the target building. Obviously, through the method in the invention, a more accurate design graph of the indoor distribution system can be obtained, and coveragequality of communication networks in the target building can be significantly improved according to the design graph of the indoor distribution system. Correspondingly, the invention also discloses adesign device and design equipment of the indoor distribution system and a medium, which also have the above-mentioned advantages.

The present invention provides a signal blind spot locating method. The method comprises the following steps that: off-line users are determined according to the signaling information of users; the off-line locations and re-network access locations of the off-line users are obtained, and an intermediate point position of the off-line location and re-network access location of each off-line user is obtained; blind area sets are determined according to the intermediate point positions of the off-line users; and signal blind spots are determined according to the location distribution conditions of intermediate points in the blind area sets. With the signal blind spot locating method provided by the invention adopted, the off-line users can be located according to the signaling data, and the signal blind spots can be accurately located, and therefore, the human and material resources of daily signal blind spot positioning work of operators can be decreased, signal blind spots in daily networks can be located conveniently, timely and accurately, and network coverage quality can be improved.

The invention discloses a lead-acid battery grid double-sided pasting mechanism by adopting a reciprocating buffering principle, which, in the structure, comprises a heat dissipating groove, a storageinterlayer, a controller, a conveyor belt, a pasting cross arm, a device host, and universal wheels. In the rotating process of a reciprocating coating shaft and an outer coating permeable cylinder,a collecting assembly with a fixed design performs bottom collection on overflowing raw materials, a pressurized plate can drive the bottom of the outer coating permeable cylinder and the raw materialfor pressing, the contact strength with a workpiece is thus increased, the raw material coverage rate of the inner cavity of the outer coating permeable cylinder is improved during a feeding processthrough reciprocating movement of a reciprocating disc, the coverage quality of the inner frame of the grid is enhanced on the whole, equal distribution of a coating surface is ensured, and the pasting quality in the case of processing of various kinds of grids is perfected.

The invention discloses a time division long term evolution (TD-LTE) transmitting system and a transmitting method based on digital pilot frequency search. The TD-LTE transmitting system comprises an analog-digital converter, a field programmable gate array (FPGA) chip, a digital-analog converter and a power amplifier. The FPGA chip comprises a digital signal processing unit and a TD-LTE transmitting control unit which is used for carrying out frequency offset correction and time division switch switching control. An output end of the analog-digital converter is connected with the digital signal processing unit, the digital-analog converter and the power amplifier in sequence. An output end of the digital signal processing unit is connected with an input end of the TD-LTE transmitting control unit, and an output end of the TD-LTE transmitting control unit is respectively connected with an input end of the digital signal processing unit, an input end of the analog-digital converter and an input end of the digital-analog converter. The TD-LTE transmitting system and the transmitting method based on digital pilot frequency search correctly switch upstream signals and downstream signals, enable the upstream signals and the downstream signals to enter corresponding links to process, and reduce influence of noise interruption, are simple in achieving method, accurate in switching, capable of improving signal coverage quality, and capable of being widely used in communication industries.

The invention discloses a multi-moving-target monitoring method based on a difference algorithm in a video sensor network. The method comprises the following steps of (1) randomly deploying a plurality of video sensor nodes in a monitoring area; (2) monitoring a moving target; (3) predicting the next moment position of the moving target; (4) each node capable of being monitored creating and maintaining a coverage rotation information table; (5) monitoring node rotation decision based on a difference optimization algorithm; and (6) rotating the node capable of being monitored according to the final optimal solution. According to the method, the position of the moving target appearing at the next moment can be predicted, and the covered nodes can be selected to rotate in the sensing direction according to the difference algorithm. According to the method, global optimization at each moment is carried out, the possible position of the target can be covered to the maximum probability, andthe covering quality of multiple moving targets is improved.