921 results about "Network testing" patented technology

Apparatus and methods facilitating a distributed approach to performance and functionality testing of location-sensitive wireless data communication systems and equipment are described. A plurality of test units, geographically distributed at arbitrary points in a three-dimensional volume surround the system or equipment under test. Each test unit generates test stimuli and records responses from the device under test, and emulates the effects of changes in spatial location within an actual wireless network environment. A central controller co-ordinates the set of test units to ensure that they act as a logical whole, and enables testing to be performed in a repeatable manner in spite of the variations introduced by the location sensitive characteristics of wireless data communication networks. The central controller also maintains a user interface that provides a unified view of the complete test system, and a unified view of the behavior of the system or equipment under test. For diagnostic purposes, the recorded responses may be regenerated to view any defects as many times as necessary to correct them. Alternatively, each test unit may have either wired network interface units, instead of a wireless interface unit to test systems or equipment forming part of a wired network portion in the wireless data communication system.

An embodiment of the present invention offloads the generation and monitoring of test packets from a Central processing Unit (CPU) to a dedicated network integrated circuit, such as a router, bridge or switch chip associated with the CPU. The CPU may download test routines and test data to the network IC, which then generates the test packets, identifies and handles received test packets, collects test statistics, and performs other test functions all without loading the CPU. The CPU may be notified when certain events occur, such as when throughput or jitter thresholds for the network are exceeded.

One embodiment of the present invention provides a system for detecting a path between two nodes. During operation, the system transmits a network-testing request frame, which includes a time-to-live (TTL) field within a Transparent Interconnection of Lots of Links (TRILL) header, from a source node to a destination node. In response to receiving a network-testing response frame sent from an intermediate node, the system increments the TTL value by 1 and re-transmits the network-testing frame to the destination node. In response to receiving a network-testing response frame sent from the destination node, the system determines a path between the source node and the destination node. The network-testing request or response frames is not processed on an Internet Protocol (IP) layer.

Network testing is conducted using a pair of traffic agents that acts as sender and receiver endpoints. The sending traffic agent generates and transmits a stream of packet batches, each batch being composed of high and low priority packets in a predetermined sending order. The receiving traffic agent analyzes the order of packet arrival in the stream relative to the sending order, and returns results to a traffic control module. Path speed and the priority classification of the traffic are parameters used to configure the tests. The tests are typically run periodically under different load conditions in order to evaluate the effects of other traffic being concurrently transiting the network.

A network testing method implemented in a software-defined network (SDN) is disclosed. The network testing method comprising providing a test scenario including one or more network events, injecting said one or more network events to the SDN using an SDN controller, and gathering network traffic statistics. A network testing apparatus used in a software-defined network (SDN) also is disclosed. The network testing apparatus comprising a testing system to provide a test scenario including one or more network events, to inject said one or more network events to the SDN using an SDN controller, and to gather network traffic statistics. Other methods, apparatuses, and systems also are disclosed.

An automated method for analyzing a plurality of network messages received by a network testing device is disclosed. The method may comprise, during a current window of time, receiving from a target network device a network message associated with an original network message determining a latency value for the received network message comparing the determined latency value with the threshold latency value; and incrementing either the first counter or the second counter based on the comparison of the determined latency value with a threshold latency value. The method may further comprise, at the end of the current window of time, storing the first and second counter values resulting from the analysis of the plurality of original network messages.

A VoIP call signaling method including a codec selection mechanism that measures the effective data transmission rate and other network characteristics. In some embodiments, a proxy performs a network test between itself and both end terminals to quantify the quality of the link before notifying both of the endpoints the optimal codec they should use for a peer-to-peer call. In alternative embodiments, the proxy informs the endpoints of the network characteristics and allows the endpoints to negotiate the codec selection. The network test preferably identifies delay, bandwidth, jitter and packet loss rates.

Systems and methods are disclosed for providing network testing. The disclosed systems and methods may include connecting to at least one element within a network. Furthermore, the disclosed systems and methods may include performing a test on the network through at least one element. The test may be associated with at least one addressable device connected to the network. In addition, the disclosed systems and methods may include analyzing data associated with the test.

There are disclosed a system, a test head and a method for testing a device under test. Two or more test heads may be mated directly with respective connectors on the device under test. Each test head may include a traffic generator including a stateless packet builder to generate stateless traffic for transmission to the device under test, and a traffic receiver including a stateless packet analyzer to accumulate traffic statistics on stateless traffic received from the device under test. A server coupled to the two or more test heads via respective communications links, may generate stateful traffic for transmission to the device under test by the two or more test heads, and may process stateful traffic received from the device under test by the two or more test heads.

Agents are instructed execute network tests during monitoring intervals. Results of the tests are stored. After expiration of a dampening window period the results are retrieved and evaluated. The evaluation is used to update an error state stored in a data structure in a database as required. Notification of detected errors is provided if certain notification dampening criteria are satisfied.

A method of network testing relies on communication with an unaddressed test device. The method includes collection of network addresses from packets passing through the test device and a discovery procedure. The collected addresses are provided to a remote control device, and used for communication between the test device and the control device.

The invention comprises the following steps: the port of network test device is connected to the network port of exchange; using network port simulated by the network test device to simulate the user in network, and meanwhile sending and receiving the test data message; examining the data receiving state to determine the forwarding performance of the exchange; the port of tested Ethernet exchange is connected to the port of network tester; wherein two testing ports are used to test several ports of the exchange.

The invention belongs to the communication technology field, in particular relates to an automatic communication network monitoring system and realization method thereof. The system comprises a network management server, a communication network, and a mobile phone test terminal. The network management server are provided with a network data acquisition module and a base station connection analysis module; the communication network which is a mobile communication network arranged between the network management server and a test terminals, and the mobile phone test terminal which is a mobile phone provided with a network test terminal management module. The automatic communication network monitoring system described in the invention can fast and accurately obtain the concrete condition of network communication quality by a commercial mobile phone, has low data acquisition cost and abundant data size, and can reflect the overall performance of a wireless communication network accurately and at real time, thereby greatly shortening the period for finding and solving problems. Thus, the system provides objective basis for network planning and optimizing, provides reliable data for customer service, and is convenient for communication network maintainers while greatly saving network test cost.

According to an aspect of an embodiment, an apparatus is transmitting / receiving an OAM frame containing kinds of tests indicating one or more tests for Ethernet-OAM to / from a relay apparatus, storing configuration information to generate a network configuration needed for each of the plurality of tests in a pseudo manner, distinguishing the kind of test contained in the relevant OAM frame and obtaining network information of a network to which the relay apparatus that transmitted the OAM frame belongs and obtaining configuration information corresponding to the obtained network information obtained from the stored configuration information.

The invention relates to tests in an Ethernet switch, and provides an entire test system and an entire test method for the Ethernet switch. By the system and the method, the problem that a conventional network tester cannot provide abundant test ports to cause the low entire test efficiency of a shared virtual local area network (VLAN) learning Ethernet switch. The technical scheme can be summarized in that: a first port of the network tester is connected with any port of the tested switch, and a second port of the network tester is connected with any layer three interface of auxiliary test equipment; and the other ports of the tested switch are connected one to one with the other layer three interfaces of the auxiliary test equipment. The system and the method have the advantages of improving the test efficiency of the shared VLAN learning Ethernet switch, along with applicability to the tests in the shared VLAN learning Ethernet switch.

A method of testing a digital mobile phone network such as a GPRS or 3 G network comprises creating test traffic using an unmodified test mobile phone coupled to a computer, and using the computer to measure a parameter associated with the network's response to the test traffic. The measurements made by the computer are encoded into the test traffic to create a data stream within the mobile phone network comprising test traffic, measurements relating to the test traffic, and signalling relating to the test traffic, whereby this data stream can be captured at points within the network and analysed to investigate the functioning of the network dynamically as the network is exercised with the test traffic. Software and test equipment for performing the method are also described.

An analysis device includes a connector, a display, a digital communication circuit and a processing circuit. The connector is configured to connect to a coaxial cable of a communication system, the communication system including a connection to a network employing internet protocol communications. The digital communication circuit is operably connected to the connector and configured to communicate information signals within the communication system via the connector. The digital communication circuit is operable to establish at least two types of connections through the communication system. The first type of data connection employs an internet protocol, while the second type of internet data connection employs a voice over internet protocol. The processing circuit is connected to the digital communication circuit. The processing circuit is operable to obtain diagnostic data relating to each of the first type of connection and the second type of connection. The processing circuit is further operable to cause the display to display information representative of the diagnostic data.

The disclosed system for network testing comprises: a testing console with user operation interface, a testing server for communicating and storing data, and the testing node for simulating multiple terminals to transmit message and test network. The corresponding method comprises: the testing console creates the configuration message for testing task and sends the message to the testing node, and the latter simulates multiple nodes for testing network. This invention is low cost and convenient.

A method may include receiving, at a first network device, a test initiation message from a control device, wherein the test initiation message includes at least an identification of a second network device. The method may further include retrieving the identification of the second network device from the test initiation message and generating test data including at least source information associated with the first network device, destination information associated with the second network device, and timestamp information associated with a time at which the test data is generated. In addition, the method may include transmitting the test data to the second network device via a data network under test and receiving return test data from the second network device. Further, the method may include generating performance information based on the return test data received from the second network device.

The invention relates to a software and hardware co-emulation verification system based on FPGA and a method thereof. The system comprises a network tester, a software system part which is arranged on an user PC terminal and a hardware system part used for simulating an integrated circuit chip; wherein, the software system part comprises a controlling platform of the network tester and an embedded system interface module; the hardware system part comprises a CPU interface module, an interface converter logic module in FPGA, a virtual waiting-for-testing module and a network interface module which can be used for realizing data exchanging between the interface converter logic module and the controlling platform of the network tester. The method is formed on the basis of the systems. The software and hardware co-emulation verification system based on FPGA and the method thereof have the advantages of being capable of carrying out high-speed emulation, greatly saving the time consumption for testing, realizing the whole-chip and whole-function verification and supporting the testing of a plurality of varieties of chips; simultaneously, the invention also has good physical expandability, adopts good debugging tools and further increases the emulation verification efficiency.

A DSL network testing tool (110) tests multiple elements (141, 143) in a DSL circuit. The testing tool may operate in either a single circuit test mode or a batch mode. In batch test mode, the network testing tool receives multiple DSL phone numbers and automatically tests the DSL circuit's elements corresponding to the phone numbers. The test information may be used when troubleshooting or provisioning DSL circuits.

Network testing is conducted using a pair of traffic agents that acts as sender and receiver endpoints. The sending traffic agent generates and transmits a stream of packet batches, each batch being composed of high and low priority packets in a predetermined sending order. The receiving traffic agent analyzes the order of packet arrival in the stream relative to the sending order, and returns results to a traffic control module. Path speed and the priority classification of the traffic are parameters used to configure the tests. The tests are typically run periodically under different load conditions in order to evaluate the effects of other traffic being concurrently transiting the network.

Embodiments of network testbed creation and validation processes are described herein. A “network testbed” is a replicated environment used to validate a target network or an aspect of its design. Embodiments describe a network testbed that comprises virtual testbed nodes executed via a plurality of physical infrastructure nodes. The virtual testbed nodes utilize these hardware resources as a network “fabric,” thereby enabling rapid configuration and reconfiguration of the virtual testbed nodes without requiring reconfiguration of the physical infrastructure nodes. Thus, in contrast to prior art solutions which require a tester manually build an emulated environment of physically connected network devices, embodiments receive or derive a target network description and build out a replica of this description using virtual testbed nodes executed via the physical infrastructure nodes. This process allows for the creation of very large (e.g., tens of thousands of network elements) and / or very topologically complex test networks.

The invention discloses a bearing fault diagnosis method based on a deep adversarial migration network, which relates to the technical field of fault diagnosis of rotary machine vibration signals. Thediagnosis method comprises the steps: firstly, vibration frequency spectrum signals of a bearing under different working conditions (different rotating speeds and loads) are obtained, data with labels under a certain working condition serve as source domain data, and data without labels under other working conditions serve as target domain data; then a deep adversarial migration model based on agenerative adversarial neural network is then built to perform data training, two generators are adopted as a feature extraction network of a source domain and a target domain, Softmax cross entropy is adopted as a fault classifier, a discriminator is additionally adopted as a domain discrimination network, and a gradient inversion layer is added to perform domain discrimination training; and finally, network testing is carried out by adopting the residual target domain data. According to the method, the deep adversarial migration model is established by adopting the structure of the generative adversarial neural network, and fault feature migration learning and intelligent diagnosis of the bearing under different working conditions are efficiently and reliably realized.

A security tool can utilize a vulnerability in a computing system or credentials for the computing system to gain access to the computing system. Once access is gained, the security tool can deliver an agent to the computing system. The agent can execute, detected or undetected, on the computing system in order to establish a network link between the computing system and the security tool. Once established, the security tool creates a virtual network interface on the computing system on which it is running and instructs the agent to relay network traffic between the virtual network interface of the computing system executing the security tool and the existing network interfaces of computing system executing the agent.

The invention discloses one method and system to realize the test on any two end systems property parameters in IP network in any place, which comprises the following steps: firstly downloading test programs to central register and manager person sets control strategy and sends test through browser; test servo starts mobile probe for test and sending test message to signal station to fulfill test result into data servo to display results.