472 results about "Service coverage" patented technology

The invention advantageously provides an alert system and method for geographic or natural disasters that utilize a telecommunications network for monitoring geographic data in disaster-prone areas and accordingly issuing warnings against potential disasters to people inside the monitored area. An alert system according to a preferred embodiment of the invention comprises a telecommunications service network, one or more wireless sensor modules and a control center. The telecommunications network according to this particular embodiment includes service coverage over the monitored areas. The wireless sensor modules are installed to selected locations inside monitored areas. Each of the sensor modules further comprises at least one sensor for collecting geographic or geodetic data and a wireless communications unit for sending collected geographic data to the control center via the telecommunications network. The control center then receives and processes the monitored geographic or geodetic data sent by the wireless sensor modules for further algorithmic analysis. The control center accordingly issues alerts for imminent geographic or natural disasters if the processing of the geographic or geodetic data produces adverse results.

A precoder and a precoding method in a multiuser multi-antenna system are provided. The precoder includes a channel checker for determining a DownLink (DL) channel condition of terminals in a service coverage area, a pre-compensator for pre-compensating, for channel distortion, signals to be sent to the terminals when a nonlinear algorithm is selected based on the channel condition of the terminals, and an interference remover for canceling interference in a channel by multiplying the pre-compensated signals by inverse channels of the terminals, and for canceling interference between the terminals. Accordingly, the pre-equalization can be carried out without global channel state information, and an increase of the transmit power can be prevented in the permutation.

The invention discloses an express system and method employing an unmanned plane, and belongs to the technical field of unmanned plane application. The system comprises at least one unmanned plane, and the unmanned plane can transport an express delivery parcel in the air. The system also comprises a plurality of ground stations, and bidirectional communication among the ground stations and between the ground stations and the unmanned plane. The ground stations are arranged according to preset nodes. The first ground station is used for receiving a request for transporting the express delivery parcel to the second ground station, and transmits the parameters of the express delivery parcel to one of the unmanned plane. The unmanned plane receiving the parameters of the express delivery parcel flies to the second ground station according to a navigation path when the first ground station obtains the express delivery parcel. The system achieves the transportation of medium and small express delivery parcels through employing the unmanned planes. Aiming at the high-frequency logistics demands among specific nodes, the system effectively enlarge the range of express service through the planning the topological structure of a node network, and guarantees the optimal logistics efficiency.

An apparatus and method of transparently relaying a signal in a direct link and a relay link using the same frequency band in a multihop relay Broadband Wireless Access (BWA) communication system. The method includes designating a start point of an asynchronous frame of the relay link by taking into account of a broadcast channel transmission interval of the direct link frame; and making a frame interval of the relay link null, where a transmission (Tx) mode of the direct link overlaps with another Tx mode. Accordingly, serving cell service coverage expansion and backward compatibility are achieved and a frame is constructed by selecting an optimum frame interval according to system information of the serving cell service. Therefore, efficient wireless access service can be provided.

A system of a wireless local area network (LAN) based on transmit power control comprises: an access point (AP) for broadcasting a beacon frame to an area that is outside a service coverage of a first transmit power by using a second transmit power higher than the first transmit power already set when it reaches a set period, and for increasing the first transmit power if there is a request for increase of the first transmit power based on the beacon frame broadcast by the second transmit power; and a station which requests an increase in the first transmit power on the basis of the received beacon frame so as to enable the station to have an association with the AP. The increase is requested when the station receives the beacon frame broadcast from the AP with the second transmit power when the station is outside the service coverage of the first transmit power. The AP periodically transmits a strong beacon frame having local maximum transmit power (LMTP), and then provides a station existing outside the transmit power coverage of a current AP with basic service set (BSS) information. In this way, a newly approaching station can be provided with a basis for associating and communicating with the BSS with ease.

A method is provided for determining service coverage for a wireless network using information indicating quality of service coverage for the wireless network, wherein the information is determined using wireless devices in conjunction with the wireless network. When the wireless device is coupled through an access point to the wireless network using a wireless communication channel, information indicating quality of service coverage for the wireless network may be received from the wireless device and gathered in a database. The quality of service coverage for the wireless network may then be monitored using the information in the database.

An optical medium, such as fiber, is tapped to provide an antenna port wherever radio service coverage is desired. Each antenna port is a bi-directional remote unit that receives a digital optical signal from a host unit and transforms the signal to a radio frequency signal for transmission by the remote unit. The remote unit receives radio frequency signals that are converted to digital signals and summed with signals from other remote units and converted to an optical signal for transmission to the host unit.

An Apparatus and a method for interference cancellation in a wireless communication system are provided. When a resource of an Interference Cancellation (IC) zone is allocated to a terminal traveling in a service coverage, resource allocation information relating to an IC zone of neighbor cells is gathered. Resource allocation information is generated relating to the resource allocated to the terminal comprising resource allocation information of the IC zone of the neighbor cells. The resource allocation information relating to the resource allocated to the terminal is transmitted to the terminal. Accordingly, when the interference is present, the interference cancellation is carried out to reduce the load on the terminal and enhance the reception performance.

A network communication entity (e.g., an access terminal, access network and / or application server) obtains a location associated with a given access terminal that is attempting to participate in a given communication service, obtains a priority level of the given access terminal, determines a given level of service restriction for the given access terminal's participation in the given communication service based on the obtained location and the obtained priority level and restricts the given access terminal's participation in the given communication service based on the given level of service restriction. In an example, the priority levels can be established such that low-priority access terminals obtain a first level of service restriction within a defined location region, and a second level of service restriction outside of the defined location region, whereas high-priority access terminals obtain the first level of service restriction both inside and outside of the defined location region.

A novel improved frequency re-use planning which allows the most efficient bandwidth utilization and a larger coverage area in a wireless communications network utilizing translating repeaters is described. The wireless communications network has an available radio frequency bandwidth divided into a number of radio frequency communication channels. The channel assignments according to the frequency re-use plan described by this invention makes possible to achieve larger service coverage area using one or more base transceiver system, and efficient utilization of the limited bandwidth allocated to the network. According to the inventive frequency re-use planning, two adjacently located frequency channels are utilized while still meeting the signal isolation requirement between the adjacent channels by assigning the adjacent channels to cells that are remotely located from each other.

Disclosed are a method and apparatus for active scanning of a station in a wireless local area network (WLAN), the method for active scanning in a wireless local area network (WLAN), the method including: receiving a probe request frame including probe request relaying information from a probe requesting station (STA) initiating the active scanning; determining whether to relay the the probe request frame; and relaying the probe request frame to an access point (AP) if it is determined to relay the probe request frame, the probe request relaying information including a transmitter address field that indicates an address of an STA transmitting the probe request frame, and a probe requesting STA address field that indicates an address of the probe requesting STA. With this imbalance between scanning coverage and service coverage in a TV WS is solved to thereby more efficiently perform scanning.

Provided are a system and method of transmitting an Aggregated Media Access Control (MAC)Protocol Data Unit (A-MPDU) in a Wireless Local Area Network (WLAN) system. A MAC layer divides service data transferred from an upper layer into a plurality of MPDUs, forms a single transmission frame including the sequentially arranged MPDUs, delimiter information for distinguishing each of the MPDUs, and ACK request information for requesting for a reception result of the MPDUs, and transmits the formed transmission frame to a recipient. Accordingly, service coverage is extended, and a transmission delay is minimized, resulting in improved service efficiency.

The control course includes three stages: setting up connection and safety performance bargin as broadcasting connection request by STA and all AP at the area to send connection response message declaring all data protective method to STA; setting up safe correlation a sending 802.1x authentication request message to AC by AP after STA safe correlation request received to request AC to use 802.1x authentication protocol to make authentication for STA by AS; resetting up safe correlation as switching the correlative switch in point from one area to another by STA as well as setting up connection and bargaining safety performance by STA and AP* as per steps in the first stage under the roaming condition with AP* service range being entered by STA.

The invention relates to an operation and maintenance monitoring platform based on big power marketing data. The operation and maintenance monitoring platform comprises a data acquisition layer, a data processing layer and a data use layer. The platform monitors operation conditions of all kinds of computer equipment, network equipment, safety products, application systems and IT equipment and all kinds of network behaviours, performs comprehensive, centralized and unified management of all kinds of equipment, finds all kinds of abnormal conditions in time, rapidly locates all kinds of event failures, automatically forms a work order, and dispatches the work order to a related department to process, such that the closed loop of a flow is finally formed; and thus, monitoring integration, service coverage generalization, monitoring intellectualization and display visualization can be realized. By means of the operation and maintenance monitoring platform disclosed by the invention, a decision-making level of the provincial power company can know whole conditions of various basic units more transparently; a management level can supervise and control works of various basic units more powerfully; therefore, various branch companies can find out weak links more rapidly and accurately; the business and service work quality supervision is improved; and power marketing staffs are technologically helped to comprehensively supervise and manage whole marketing services.

The invention provides an intelligent door safety control system based on video service and an intelligent door safety control method based on video service. The intelligent door safety control system comprises a video image acquiring system, a voice system, a network transmitting system, a storage system, a door switch system, mobile terminal equipment, a power supply system and an integrated processor. According to the intelligent door safety control system, by virtue of the three main systems of the video image acquiring system, the voice system and the mobile terminal system and by means of the network transmitting system, multiple intelligent functions of an access control system are realized, and comprise visitor video image acquisition, visitor identification and classification, voice message, voice warning, automatic material receiving, automatic / manual door control switching, power supply detection switching, visitor behavior judging, pre-warning, multiple signal transfer outputs and the like. By virtue of front-end video monitoring, middle-end network transmitting and terminal mobile equipment, a house owner, a visitor and an intelligent door perform an interactive action, so that the service range and applicability of the intelligent door are enhanced. The safety and user use experience of the intelligent door are greatly improved.

The invention relates to a full-automatic oiling serving robot for an unmanned oiling station.The full-automatic oiling serving robot comprises an external-expansion type rail, a movable intelligent platform, an industrial mechanical arm, a function switching rotating disc, a humanoid mechanical gripper, an electric suction cup, a touch mechanical gripper, a machine vision system, a man-computer interaction system, an oiling gun, an oiling machine, an oil pipe and a control cabinet.Automatic station switching of different kinds of devices is achieved through the function switching rotating disc in cooperation with supports with different functions and the like, and switching efficiency is improved; full-automatic oiling operation of different vehicles is achieved by using the humanoid mechanical gripper, the electric suction cup and the touch gripper in a matched mode, and the serving range of the robot is expanded; shape and position identification of outer cover plates and oil tank covers of automobiles is achieved in combination with the machine vision system, and the functions of monitoring and identifying the running condition, automobile license plates, owner identity and the like are further achieved; due to the cooperation of the human-computer interaction system, the types of the automobile oiling services of the full-automatic oiling serving robot are richer, and the application range is wider.

A wireless network performance management system and method. The system includes at least one collection agent for collecting data related to at least one of service coverage; service quality; and usage of public and / or private data networks for enterprise clients, and a reporting unit to graphically represent the collected data to at least one of track, troubleshoot, and analyze the one of the service coverage; the service quality; and the usage of public and / or private data networks for the enterprise clients.

The present invention relates to a vertical handoff method. According to the present invention, a serving network of a mobile station is determined. Herein, the mobile station that can access a first network having relatively wide service coverage and a second network having relatively narrow service coverage in an area where service coverages of heterogeneous networks are overlapped. When accessing the serving network of the first network, it is determined whether a received signal strength received from the second network is greater than a first threshold value. In addition, a first vertical handoff is decided by using a result of prediction of a transition pattern of the received signal strength that is greater than the first threshold value. When the serving network is the second network, it is determined whether the received signal strength received from the second network is less than a second threshold value. By using a result of prediction of a transition pattern of the received signal strength that is less than the second threshold value, a second vertical handoff is decided. Herein, the first threshold value is greater than the second threshold value.

The invention discloses an electromobile charging and exchanging power station stationing and planning system and method. The system and method comprises an electromobile charging and exchanging power station stationing, planning and decision-making management centre, a vehicle-mounted collection terminal and a method for stationing and planning by using the system. The electromobile charging and exchanging power station stationing, planning and decision-making management centre is connected with the vehicle-mounted collection terminal through an electric power private network, the electromobile charging and exchanging power station stationing, planning and decision-making management centre comprises a preposition service device, a data storage device and a layout planning service device, the data storage device comprises a relation data base server and a real-time data base server, and the layout planning service device comprises servers such as a global information system (GIS) server and an area calculation server. The electromobile charging and exchanging power station stationing and planning system and method can effectively prevent newly-built electromobile charging and exchanging power stations from building in the service scope of the existing electromobile charging and exchanging power station, improves feasibility and rationality of an electromobile charging and exchanging power station stationing and planning scheme, improves use ratio, charging ratio and work efficiency of the electromobile charging and exchanging power station.

The invention discloses a logistics service range determination method and device. The logistics service range determination method comprises the following steps: extracting the address text of each logistics service site from historical logistics data; according to the address text of the service site, determining the position coordinate of the service site; for a service site set corresponding to any service provider, calculating the external polygon of the set according to the position coordinate of the service site; and according to the external polygon obtained by calculation, determining the service range of the corresponding service provider. According to the scheme, the service range is shown by the polygon so as to bring convenience for users to understand and memorize; in addition, for a given site, whether the site is positioned within the service range or not can be directly determined by judging the position relationship between the site and the external polygon; high processing efficiency is provided; and dependency on the completeness of historical address data is lowered.

A method for transmitting data in a direct link setup (DLS) wireless network and an apparatus supporting the method, and a new frame format for the data transmission method are disclosed. A data transmission method of a tunneled direct link setup (TDLS) wireless network, including: transmitting a TDLS relay request message including relay destination station (STA) information; receiving one or more TDLS relay response messages with respect to the TDLS relay request message from one or more STAs; and selecting a relay STA from among the one or more STAs, and transmitting data desired to be transmitted to the relay destination STA, to the relay STA. A service coverage of a basic service set (BSS) can be extended, communication can be performed at low power consumption, and power of stations can be easily managed.

The invention discloses a road-vehicle cooperation-based communication method and road-vehicle cooperation-based communication equipment. Based on a space model that each road side unit (RSU) comprises a service range and a control channel (CCH) range, a method for switching a service channel (SCH) and the CCH is adopted. At a CCH transmission interval, an on-board unit (OBU) can apply adjacent RSU2 for switching parameters to perform pre-switching, when switching conditions are accorded, the applied switching parameters are directly called to switch the CCH to adjacent RSU2, and the switching time delay is shortened; and at an SCH transmission interval, when OBU1 departs from the current service range of the RSU1, the RSU1 communicates with the RSU2 through vehicle-vehicle forwarding, and when OBU1 enters the service range of the adjacent RSU2, the applied switching parameters are directly called to switch the SCH to adjacent RSU2; therefore, the SCH is seamlessly switched under the condition that the service ranges of the two adjacent RSUs have no overlap area.

A method of assigning Multimedia Broadcast Multicast Service (E-MBMS) bearers in a Multimedia Broadcast Single Frequency Network (MBSFN) area in a 3GPP compliant wireless communication system is provided. An infrastructure device is operably coupled to a radio access network comprising one or more MBSFN areas, wherein each MBSFN area supports a plurality of E-MBMS bearers for transporting media streams to user equipments (UE). The infrastructure device receives, from a UE, an identifier of a preferred MBSFN area and a request for a boost to the quality of the transmissions. The infrastructure device assigns first and second E-MBMS bearers in an MBSFN area to support a call to the UE, the first and second E-MBMS bearers providing the same information to the UE in their media content streams. The UE may employ application layer time-diversity reception of the media content.

A centralized scheduling method and apparatus is provided for minimizing inter-cell interference in the wireless communication system adopting femto-eNB-based service coverage expansion (range expansion). The method includes establishing, by a server, a connection with at least one base station, collecting channel information between the at least one base station connected to the server and terminals, determining interfering base stations causing interference to each terminal based on the channel information, and selecting the terminals to be scheduled in consideration of the interfering base stations.

The invention belongs to the field of network information services, and provides a service system for enterprise innovation. The service system comprises an information retrieval module, a scientific and technological achievement module, a project application module, a high-end talent service module and an industry-university-research cooperation module. According to the service system, the information of the information retrieval, scientific and technological achievements and project applications is collected to be uniformly stored into a server of a distributed cloud storage architecture to form an integrated searching library, and in addition, the integrated service comprising industry-university-research cooperation composed of enterprises, governments and universities and financial inquiring of other policies is achieved, and a national scientific and technological project achievement full-text searching system is established. The service system has the advantages of being more comprehensive in searching, wide in service range, high in service quality and the like.

A mobile communication device (202) outside the service area of a communications network 210 in need of satellite positioning assistance information to perform a location determination (308). The mobile communication device receives the assistance information from a peer mobile communication device (204, 206) over a direct link.

A system and method for traffic flow reporting are provided. An satellite digital audio radio service (SDARS) system receives traffic flow information for segments of roads with service coverage at a vehicle. A vehicle communications, navigation and tracking (VCNT) service system compares present Global Positioning System (GPS) position of the vehicle with the traffic flow information received from the SDARS system. If the present GPS position is within a segment, the VCNT service system compares present vehicle speed with a received traffic flow speed range. If vehicle speed is outside a received traffic flow speed range, the VCNT service system generates a message with present location and speed. An automated traffic flow aggregation system receives the message transmissions and applies location-specific filters based on number of messages received before forwarding a flow speed revision message to an SDARS broadcast station for broadcasting the traffic information to subscribers. RDS-formatted (e.g., ALERT-C) location codes can be stored at the vehicle and used in the SDARS broadcast of traffic flow information to refer to segments.

The invention discloses a design method of low-altitude public air route network of an unmanned aerial vehicle, and belongs to the technical field of air route planning. The method includes the following steps that unmanned-aerial-vehicle low-altitude flight environment data in a planning area is obtained; according to the unmanned-aerial-vehicle low-altitude flight environment data, unmanned-aerial-vehicle airport layout information is obtained, wherein the unmanned-aerial-vehicle airport layout information includes location sites of multiple UAV airports and service scopes of the UAV airports; according to the unmanned-aerial-vehicle airport layout information, the unmanned-aerial-vehicle low-altitude flight environment data and the ant colony algorithm, several three-dimensional routesare obtained; according to the several three-dimensional routes, the low-altitude public air route network of the unmanned aerial vehicle is formed. According to the technical scheme, the low-altitudepublic air route network of the unmanned aerial vehicle is constructed, the path search efficiency is higher when an air route is constructed, and less time is consumed.

A handover method of a portable terminal includes checking communication quality during a movement of the portable terminal in a service coverage area of a serving cell; when the communication quality is lower than preset communication level, determining one or more neighbor cells exceeding the preset communication level by considering a travel speed of the portable terminal; selecting a neighbor cell from the determined neighbor cells; and performing a handover to the service coverage area of the selected neighbor cell.

The present invention relates to an electric taxi charging station planning method based on an adaptive quantum genetic algorithm. The method comprises the steps of (1) initializing basic data needed by planning, and estimating the value range of a charging station number, (2) randomly generating a chromosome corresponding formula, and forming a population, (3) carrying out solution space transformation and mapping a randomly generated angular space to a charging station address coordinate space, (4) using a Voronoi diagram to divide the service range of a charging station corresponding to chromosome, (5) calculating the average waiting time in queue of each charging station based on the charging requirement in the service range, (6) planning the expression of total society whole year total cost target function minimization according to electric taxi charging stations, (7) carrying out a quantum rotation gate updating operation and a quantum bit variation operation, (8) returning to the step (3) to carry out loop calculation until a convergence condition is satisfied. The method has the advantages that the optimized layout of charging station site is realized, the influence on the planning by taxi distribution, passenger demand distribution, and a road network structure can be reflected, and the method is effective and practical.