665 results about "Network analyser" patented technology

A proactive network analysis system is a single unit for diagnosing network problems, measuring network performance, and monitoring network status in a comprehensive manner. The system is a compilation of individual tools including a distributed network packet capture data stream collector; a traffic analyzer; a performance graphing unit; a syslog recorder analyzer and archiving unit; a system availability monitor; a device configuration archiving unit; and a throughput measurement tool. The system can further provide an access list generator, an access list analyzer, a router DNS name generator and a service level agreement measurement device.

Embodiments of the invention provide a method for determining errors and metrics in a computer network. The method includes positioning an analyzer in communication with the network, capturing a data trace of the network with the analyzer, determining a network device topology from a first processing of the data trace, building user layer protocols using a second processing of the data trace and the determined device topology, determining errors in the network device topology using protocol experts applied to the user layer protocols in conjunction with the determined device topology, and displaying at least one of the device topology and the determined errors to a user.

A method and system for analysing and measuring multiple sources of data over a communication network (18) so as to ascertain information or usage of one or more resources, such as resource servers (2). A data collection and processing means (20) collects and processes the data sources which are forwarded to a reporting server (34) as a combined data source made available to interested parties.

The invention relates to a method for calibrating a vectorial network analyser having n measurement ports and at least 2n measurement locations (n>1) by successive measurement of the reflection and transmission parameters at different two-port calibration standards, which are connected between the measurement ports in any desired order and must all have a transmission path, and three different n-port calibration standards, which are connected between the measurement ports in any desired order and which are not permitted to show transmission and by calculation of error coefficient and scattering matrix [Sx] with the 10-term or 7-term multiport method. An object of the invention is to propagate a method for calibrating these vectorial network analyser used for multiport measurement which permits a calibration with increased precision and considerable reproducibility of measurement. This problem is solved by the measurements of a thru standard, which is contacted between each possible measurement port combination, of n known, if appropriate different impedance standards and two unknown, there selves calibrated reflection standards at a n-one-port.

The embodiment of the invention provides a geographic information system applied to a power system and a method for improving display efficiency thereof. The system comprises a data unit, an interface engine unit, a power grid data model unit, a system component unit, a map layer management component and an application component unit, wherein the data unit stores two-dimensional geospatial data and attribute information of a power grid equipment object; the interface engine unit provides an interface display control and a message mechanism and is interacted with a user; the power grid data model unit is used for accessing the data unit to establish and maintain a power grid equipment model and performing network analysis on the power grid equipment model; the system component unit is usedfor calling services of the interface engine unit and the power grid data model unit and implementing display of a map and operation of the map, wherein the services comprise map display and component operation; the map layer management component is used for providing a management tool to support the display of the map; and the application component unit comprises a power grid modeling component and is used for calling the service of the power grid data model unit through the system component unit to perform modeling on power grid equipment. The system realizes function customization and flexible expansion.

Various embodiments of a method and system for detecting unauthorized signatures to or from a local network. Multiple sensors are connected at an internetworking device, which can be a router or a switch. The sensors operate in parallel and each receives a portion of traffic through the internetworking device, at a session-based level or at a lower (packet-based) level. Depending on the type of internetworking device (router or switch) the load balancing mechanism that distributes the packets can be internal or external to the internetworking device. Also depending on the level of packet distribution (session-based or packet-based), the sensors share a network analyzer (if session-based) or both a network analyzer and a session analyzer (if packet-based).

The present invention relates to method and apparatus of analyzing a wired / wireless communication network to optimize performance of the network. In the present invention, data are continuously gathered from all elements constituting a wired / wireless communication network and are analyzed to find an element of which performance and / or efficiency deteriorates. If found, an optimal plan to resolve low performance and / or efficiency is chosen through the data analysis and is then provided in real time. The present invention also relates to a recording medium storing computer programs to conduct said procedures.

A network analyzer includes a sampler and a network anomaly detector. The sampler acquires communication data flowing through nodes by a data collector, estimates a topology of the nodes based on the acquired communication data by a topology estimator, stores the estimated topology of the nodes in a storage, reads out the estimated result from the storage to generate a predetermined item for each read-out topology of the nodes as a sampling rule by a rule generator, and samples the supplied communication data based on the generated sampling rule by a packet sampler. The topology of the network is thereby estimated in advance to narrow down objects to be sampled. The behavior of the communication data can thus be grasped in correlation between a target network and other networks.

The invention discloses a microgrid energy management system which comprises an information collection and data preprocessing unit, a network analysis unit and an energy optimization unit, wherein the information collection and data preprocessing unit performs data mining preprocessing on information, collected by SCADA / PMU mixed measurement, by adopting a CIM model and combining historical section management, the network analysis unit is used for realizing mixed measurement-based microgrid state estimation on the basis of network topology analysis, performing risk analysis and assessment and sensitivity analysis to realize early warning and warning for failure threat, and adopting corresponding precautionary measures or performing emergency control, and the energy optimization unit is used for performing microgrid energy optimization scheduling by combining forecast information and system operation analysis according to the information of the microgrid state estimation. The invention also provides a method which adopts the microgrid energy management system to perform microgrid energy management. The functions of the microgrid energy management system are further perfected, and the system safety, the power supply reliability and the system control accuracy and effectiveness of a microgrid are improved.

This invention relates to a diagnostic tool for networks that process messages in stages such as pipelined networks. In a pipelined network comprising tiers of servers, each tier of servers communicates only with adjacent tiers in a communications flow that processes messages in a sequence of tiers. The tool requires a controller located locally with respect to the pipelined network for generating messages to be processed by the pipelined network. Communication paths connect the controller to each tier of the pipelined network. A program executing at the controller detects a failure of the processing of the message by the pipelined network and receives diagnostic information from the tiers after the failure is detected. The diagnoses based on the retrieved information can proceed either manually or automatically, depending on how the information is collected. In order to automate the diagnosis, the program executing on the controller includes commands for sequentially analyzing each tier in the pipelined network in order to isolate the tier in which the failure occurred. For manual diagnosis, the program includes commands for simultaneously (or almost simultaneously) requesting information from each tier upon network failure. In the manual approach, distributed agents at all of the tiers gather information about the operating of the tier at the time of network failure.

The present invention provides for flexibly configurable network diagnostic modules that can implement any of a plurality of network diagnostic functions. A network diagnostic module receives an indication that a selected network diagnostic function (e.g., network analyzer, jammer, generator, bit error rate tester, etc.) is to be implemented. The network diagnostic module receives a bit file with instructions or data for implementing the selected network diagnostic function at one or more ports. The network diagnostic module identifies a programmable logic module (e.g., a Field-Programmable Gate Array (“FPGA”)) that controls the one or ports. The network diagnostic module loads a portion of the bit file at the identified programmable logic module to cause the programmable logic module and the one or more ports to interoperate to implement the selected network diagnostic function. A plurality of network diagnostic modules can be included in a common computer system chassis.

In performing network analysis, a declarative specification of a collector element and a declarative specification of a processing element are received. The declarative specification of the collector element specifies a dynamically updating query associated with networking components of a computer network. The processing element dynamically processes dynamically updated results of the dynamically updating query. At least the collector element and the processing element are executed. An indication of a detected anomaly is provided based at least in part on a result of the execution of the collector element and the processing element.

Embodiments of the invention provide a method for analyzing a data trace representative of an FC network. The method includes determining a topology of the network, filtering the data trace for open commands that are not perceived by at least one analyzer positioned in communication with the network and eliminating devices associated with these open commands not received by an analyzer from further analysis, filtering the data trace for failed open commands and eliminating devices associated with the failed open commands from further analysis, and filtering the trace data for frames to destinations that are not received by the analyzer and eliminating devices associated with these frame from further analysis. The method further includes filtering frames transmitted when a loop is in closed state and eliminating devices associated with transmitting frames when a loop is closed from further analysis, and conducting error analysis of the network topology not eliminated by a filtering step.

The present invention provides a method an apparatus for adaptively refining the sampling within an IP network performance monitoring and diagnosis framework. This ability to adaptively adjust the resolution of the sampling can enable variable accuracy and detail in the related IP network analysis. The sampling resolution can be defined as, for example, the load on the network in terms of the rate of packet transmission, the statistical variance thereof and the complexity of the sampling procedure. Each sampling and analysis procedure determines one or more network parameters referred to as critical indicators. Decisions for subsequent samplings and actions are made based on the determination of these critical indicators. As such various evaluation activity levels are defined by conditions that can be checked for and detected within the context of that activity level. A feedback / feedforward process can be used to enhance the resolution of subsequent samplings, for example movement to a more detailed activity level, if the need is required. In addition, the present invention can support activities such as automated remediation wherein problems in a given IP network path that are identified during the sampling and diagnostic evaluation thereof are subsequently resolved by making changes in the path. The present invention can automate and enhance the monitoring, diagnosis and remediation processes, thereby reducing human involvement until human intervention may be required. In addition, the automatic functionality inherent within the present invention can enable the sampling to be scalable and responsive to changes in IP network conditions as they arise.

An automobile's maintenance port is wirelessly connected (for example, via an IEEE 802.11-based connection) to a plurality of gateways / routers that forward automobile diagnostic data (such as a series of diagnostic codes) to a network analyzer server. The network analyzer server offers subscribers a service providing analysis of the received diagnostic data, wherein such analyzed information is transmitted to one or more predetermined locations (such as to a personal computer of the subscriber or a mechanic's diagnostic device at a service station). Thus, homeowners and garages receive the same data and the system eliminates the need for garages to purchase expensive engine analyzers.

A system for the integrated archiving, restoring, purging, importing and exporting of semiconductor wafer data, the system including: a data acquisition system 00 for acquiring scan data from differing types of semiconductor wafer scanning tools such as wafer dimensional tools 10, wafer inspection tools 12, and wafer nanotopography tools 14; a buffer system 02 for providing temporary storage for scan data transmitted over a network from the data acquisition system and for providing fault tolerance; a server system 04 for providing storage for the scan data transmitted from the buffer system 02 and converting the scan data into a format used by and stored in a database 08 management system; and an analysis system 06 client station including a display and communicating with the server system 04 over the network, the analysis system 06 and the server system 04 managing the purging, archiving, restoring, importing and exporting of scan data.

An apparatus includes a coupling, a diagnostic circuit, a cable modem circuit, a display, and a processing circuit. The coupling is configured to connect to a coaxial cable termination of a communication network, and is operable to receive broadband RF signals. The diagnostic circuit is operably coupled to the coupling to receive a first RF signal, and is operable to obtain diagnostic information regarding the first RF signal. The cable modem circuit is operably coupled to the coupling to receive a second RF signal, and is operable to generate data packets from the second RF signal. The cable modem is further operable to generate an RF transmission signal, the RF transmission signal including transmission data packets. The processing circuit is connected to the cable modem circuit and is operable to execute a web browser. The web browser is operable to cause the display to display information obtained from the data packets. The processing circuit is further operable to cause display of at least some diagnostic information.

The invention discloses a plain river network urban flood simulation method for drainage basin water system and urban pipeline network coupling. The method comprises the following steps that: S1: constructing a drainage basin runoff model; S2: constructing an urban rain pipeline network model; S3: coupling the drainage basin runoff model with the urban rain pipeline network model; and S4: carryingout urban flood simulation and prediction. By use of the method, network analysis between a drainage basin water system and an urban boundary is established, the runoff models of different scales ofthe drainage basin and the city can be linked, simulation accuracy is improved, and the method is high in regional applicability.

The invention provides an urban traffic flow network analysis method based on a complex network theory, comprising the following steps: A: pre-processing urban traffic data and vehicle track data; B:dividing the city by region, extracting a starting point and a termination point D of the vehicle track, counting the traffic flow in the region so as to construct an urban traffic flow network; C: calculating the topological structure and flow characteristic parameters of the urban traffic flow network; D: performing a statistical distribution calculation for the structural characteristic and flow characteristic parameters in the urban traffic flow network and correlation analysis on the characteristics. The method of the present invention adopts the empirical traffic data to provide a perspective of traffic demand and traffic flow at the whole urban level from the perspective of a complex network, understands the characteristics of transportation demand in urban residents, and provides amethodological support for control of the future urban traffic operation status and planning management for operating the urban public transportation.

A network analysis system and methods facilitate a match-corrected signal power measurement using a vector network analyzer (VNA). The network analysis system includes the VNA and a computer program stored in memory and executed by a controller. The computer program has instructions that implement one or both of calibrating a test port of the VNA to determine the match-corrected signal power measurement and correcting a power measured for a signal received at the test port of the VNA using corrected error terms of a port calibration of the test port to yield a corrected measured power. The corrected error terms are determined from error terms of the port calibration using a switch term and an incident power calibration, both of the test port. A method 100 determines the match-corrected signal power measurement and a method 300 calibrates the VNA test port to determine the measurement.

The invention is a system and method used for detection, analysis, and reporting on player metrics of a sporting event using video images. The main components of the invention are: grabbing a digital video image frame or grabbing an analog video image frame and converting the analog video image frame to a digital video image frame, extracting field of play markings from the video image frame(s) for use as image control points, creating a perspective projection registration model based upon the pairing of image control points with a set of user-defined control points representative of the field of play, extracting player image locations on each team from the video image frames, and applying the perspective projection transformation model to register participant image locations to their respective planimetric coordinate position on the user defined field of play. In the case of processing multiple video image frames, to correct errors across perspective projection transformation models developed on each image frame, a final bundle adjustment affine transformation model is applied to correct participant locations. Analysis of players use network analysis, pattern analysis, spatial interpolation, hypothesis testing, or forecast modeling can then be performed with reports in tabular, chart and graphic, or cartographic formats.

The invention discloses a network abnormal traffic detection method based on a PAM (Partitioning Around Medoids) clustering algorithm. The method comprises a traffic collection stage of monitoring a network to obtain network data packets through a network analysis tool; a feature extraction stage of extracting attributes of the network data packets, and carrying out information entropy calculation on the attributes of the network data packets in a time period, thereby obtaining multiple multi-dimensional data records; a center selection stage of clustering data points of the network data packets by employing the PAM clustering algorithm according to the multi-dimensional data records, and selecting precise clustering centers through approximate clustering after approximate clustering centers are obtained; and an outlier judgment state of setting a threshold value, and screening data points of which precise clustering center distance and partial outlier factors are greater than the threshold value, thereby obtaining outlier abnormal data. According to the method, the improved PAM clustering algorithm is applied to abnormal traffic detection, the advantage that clustering is unnecessarily marked is inherited, moreover, the operation time required by the algorithm is reduced, and the capability of processing more data can be realized.

Methods and systems for proactively maintaining a telephone system local loop. One embodiment includes acquiring at least one type of information selected from the group consisting of information from a Dynamic Network Analyzer and information from a Loop Facilities and Control System. This information is stored in memory, and the stored information is combined. This method may also include predicting proactive maintenance based upon the combined information. Another embodiment includes communicating with a communications network and acquiring at least one type of information selected from the group consisting of customer information associated with copper line pairs and service information associated with copper line pairs. The acquired information is stored in memory and combined to predict proactive maintenance of the telephone system local loop. Still another embodiment describes a system including software modules communicating with a communications network. A Dynamic Network Analyzer module communicates with the communications network and acquires Dynamic Network Analyzer information. A Loop Facilities and Control System module communicates with the communications network and acquires Loop Facilities and Control System information. A database interfaces with the Dynamic Network Analyzer module and with the Loop Facilities and Control System module, with the database storing the Dynamic Network Analyzer information and the Loop Facilities and Control System information. A processor is also included, and the processor is capable of processing information stored in the database and of generating proactive maintenance.

A network analyzer is capable of measuring the antenna return loss in a live cellular network. The network analyzer receives and analyzes the base station transmitted signal to determine which transmit frequencies are active. Based on information relating to the correlation between the transmit frequency and the associated receive frequency, the network analyzer determines the active receive frequencies. An unmodulated source that avoids inclusion of the active receive frequencies is generated by the network analyzer. To fill in the antenna sweep with the previously avoided frequencies, the network analyzer generates another source containing only those avoided frequencies when no calls are active on the avoided frequencies. Alternatively, the antenna return loss on the avoided frequencies is interpolated from the measured frequencies. As a further alternative, the network analyzer receiver determines a nearby frequency to an active frequency, and adaptively measures the nearby frequency as the avoided (active) frequency.

The present invention relates to method and apparatus of analyzing a wired / wireless communication network to optimize performance of the network. In the present invention, data are continuously gathered from all elements constituting a wired / wireless communication network and are analyzed to find an element of which performance and / or efficiency deteriorates. If found, an optimal plan to resolve low performance and / or efficiency is chosen through the data analysis and is then provided in real time. The present invention also relates to a recording medium storing computer programs to conduct said procedures.

A system and method for predicting sudden cardiac death. The system includes a patient monitoring station, a Holter analysis workstation, and a hospital information network. The Holter analysis workstation being operative to apply a plurality of data analysis algorithms to create a sudden cardiac death report. The method applies a first data analysis technique and a second data analysis technique to electrocardiographic data to produce an indication of sudden cardiac death risk.

A method for accurately determining the provisional quantity and provisional locations of power supply pads prior to detailed layout of a semiconductor integrated circuit. The method decreases redesigning, shortens the design time, and lowers design costs. The method includes performing a power supply network analysis of the core section to obtain voltage values of the nodes, calculating current values between the nodes from the voltage values of the nodes and the resistances between the nodes, and calculating current values of the power supply pads from the current values between the nodes. The method further includes determining whether to eliminate or add a power supply pad depending on whether the current value of each power supply pad exceeds the current capacity of an associated IO buffer.

A method for scoring a user's propensity for credit fraud includes forming a social graph from Call Detail Records (“CDR”), the users being nodes and weighted edges connecting node pairs representing a relationship between those users. Initial scores are assigned to users. A first user / credit applicant final score is calculated as a sum of all weighted initial scores of users having a degree of separation of n with the first user, along a path of connecting edges on the social graph, each weighted initial score being a product of the weight of the edges connecting the corresponding node pair, the user initial score, and the inverse square of the degree of separation with the first user. The summation of the degree weighted initial scores of users with degree of separation of n or less is the first user's credit-fraud score.

A vector network analyzer (VNA) in accordance with the present invention for measuring a frequency response of a device under test (DUT) includes a signal source, a port, a signal path connecting the port and the signal source, and a reflectometer receiver that when activated taps onto the signal path within a primary frequency range. The port is adapted to be electrically connected with the DUT while disconnected from a frequency-extension module or electrically connected to the DUT with the frequency-extension module serially connected between the port and the DUT. When the port is electrically connected with the DUT and electrically disconnected from the frequency-extension module, the reflectometer receiver is active so that the frequency response of the DUT is measureable within the primary frequency range using the reflectometer receiver and the signal source. When the port is electrically connected with the DUT in series with the frequency-extension module, the reflectometer receiver is deactivated so that the frequency response of the DUT is measureable within a extension frequency range wider than and substantially overlapping the primary frequency range using the frequency-extension module and the signal source.

The invention relates to the technical field of substations and discloses a monitoring system and a method of the operation condition of a digitalized substation secondary device. The system comprises a plurality of digitalized substation secondary devices and station level devices, wherein the secondary devices are directly or indirectly connected with the station level devices through respective network message recording device. The system also comprises a condition monitoring device and a plurality of network analysers corresponding to the network message recording devices, wherein the network analysers are respectively connected with the corresponding network message recording devices, and the condition monitoring device is respectively in communicating junction with each network analyzer and each station level device. In the invention, through additionally arranging the corresponding network analysers and the condition monitoring devices in the existing comprehensive automation communication network of a digitalized substation, the requirements of monitoring the condition of the digitalized substation can be fully satisfied so as to provide related data support for the condition repairing system and life time cycle cost management of the digitalized substation built on the basis of the invention and other advanced applications.