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 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 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 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 discloses a beam coverage management method, device and equipment. The management method comprises the following steps: acquiring measurement data related to beam coverage quality; performing analysis according to the measurement data, and determining a beam adjustment scheme when it is determined that beam adjustment needs to be performed; and performing beam adjustment according tothe beam adjustment scheme. According to the embodiments of the present invention, by analyzing the measurement data related to the beam coverage quality, beam adjustment can be performed to optimizecell signal coverage, thereby improving the overall coverage quality of a cell.

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 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.

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 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.