Sunnyvale, CA, United States
Sunnyvale, CA, United States

Spirent Communications plc is a multinational telecommunications testing company headquartered in Crawley, West Sussex, in the United Kingdom. It is listed on the London Stock Exchange. Wikipedia.


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The technology disclosed enables the automatic definition of monitoring alerts for a web page across a plurality of variables such as server response time, server CPU load, network bandwidth utilization, response time from a measured client, network latency, server memory utilization, and the number of simultaneous sessions, amongst others. This is accomplished through the combination of load or resource loading and performance snapshots, where performance correlations allow for the alignment of operating variables. Performance data such as response time for the objects retrieved, number of hits per second, number of timeouts per sec, and errors per second can be recorded and reported. This allows for the automated ranking of tens of thousands of web pages, with an analysis of the web page assets that affect performance, and the automatic alignment of performance alerts by resource participation.


Patent
Spirent Communications | Date: 2016-10-17

A method is provided for aligning RF signals of a first channel bank and additional channel banks in a test platform. A plurality of correlators is used to correlate a reference code signal carrying a particular code at a particular chip rate with a received code signal carrying the particular code at the particular chip rate from the first channel bank to establish a first timing offset. The plurality of correlators is used to correlate a continuation of the reference code signal with additional received code signals carrying the particular code at the particular chip rate from the additional channel banks to establish additional timing offsets. The first timing offset and additional timing offsets are applied to the first and additional channel banks. The plurality of correlators includes at least 12 correlators, and a timing offset is established in a correlation interval having a shorter duration than the particular code.


Grant
Agency: Cordis | Branch: H2020 | Program: IA | Phase: GALILEO-2-2014 | Award Amount: 732.74K | Year: 2015

The objective of this project is to provide a basis upon which Galileo can be relied upon to the same extent that GPS is currently, especially by the Aviation user community and then beyond. It is proposed that DWIs existing GNSS Performance Monitoring System (GPMS) is enhanced to include EGNSS and this platform can latterly include other constellations and augmentations for use beyond Europe. The project shall gather EGNSS signal data for analysis and comparison thereby providing the aviation community the confidence they need for including EGNSS within their planning for navigation. It will monitor new signals alongside the GPS signals and provide operationally relevant information to existing and new users of the GPMS. In addition, the system will be updated to include the capability for the monitoring of interference and spoofing.


Patent
Spirent Communications | Date: 2015-09-16

A new test control structure improves on constructing complex test sequences in a scripting language. The new test control structure iterates over two or more arbitrary values of a test attribute, such as a networking protocol parameter applied at OSI layers 2-7.


Patent
Spirent Communications | Date: 2015-09-16

Networks and applications can have many different profiles. Template configurations can consist of a wide variety of technologies such as IPv4, DHCP, and BGP. A list of application profiles would include web services, VoIP, Email, and Point-to-point. Network and application profiles can be combined into topology templates. Test methodologies can include complex sets of instructions that allow for testing any number of topology templates in a number of ways. The technology disclosed allows for the assembly, edit, and execution of those profiles and methodologies by someone who does not possess detailed domain knowledge.


Patent
Spirent Communications | Date: 2016-02-03

The technology disclosed relates to systems and methods for testing adaptive antennas via a multi-probe anechoic chamber, which includes the emulation of real world conditions of a radio frequency (RF) signal reaching a device-under-test (DUT). The technology disclosed can be applied to test and evaluate a range of changed conditions. In one case, beamforming scenarios use separate spatial desired and interference signals, and the results can be compared to uniform interference. Based on performance for a segment of a test profile, the segment can be modified or expanded: shortened, repeated, or repeated with a modificationto fully evaluate the aspect being tested. Also, a dynamic profile that is utilized to evaluate a first device can be saved and repeated as a fixed profile for further testing of a first or second device.


Patent
Spirent Communications | Date: 2015-03-24

The technology disclosed relates to scoring user experience of video frames displayed on a mobile or other video display device. In particular, it relates to capture alignment and test stimulus isolation techniques that compensate for artifacts in the capture mechanism. The technology disclosed includes methods and systems for analyzing both downlink and uplink quality for mobile or other video display device cameras capturing and transmitting video frames including teleconference video display. Particular aspects of the technology disclosed are described in the claims, specification and drawings.


Patent
Spirent Communications | Date: 2015-03-24

The technology disclosed relates to scoring user experience of video frames displayed on a mobile or other video display device. In particular, it relates to capture alignment and test stimulus isolation techniques that compensate for artifacts in the capture mechanism. The technology disclosed includes methods and systems for analyzing both downlink and uplink quality for mobile or other video display device cameras capturing and transmitting video frames including teleconference video display. Particular aspects of the technology disclosed are described in the claims, specification and drawings.


Patent
Spirent Communications | Date: 2015-01-15

The present invention relates to simulation on a lab workbench of conditions that would be encountered by a mobile device during a so-called drive test, which involves transporting the mobile device along a course so that it encounters fading and changing wireless access points used normally to connect the mobile device to a wireless network but in this case used to locate the device. The instrument and method also support parametric testing of transceivers used for WiFi positioning and, optionally, GNSS positioning by the same mobile device used for WiFi positioning.


Patent
Spirent Communications | Date: 2015-07-16

The disclosed technology relates to systems and methods for emulating a massive MIMO beamforming antenna array of arbitrary sizea channel model between a transmitter and a receiver, with one or more signal paths having respective amplitudes, angles of arrival, angle spreads, and delays. The disclosed technology includes defining a complete channel model H, calculating the correlation matrix for the channel, grouping the base antenna elements of the antenna array by combinations of signal and polarization, and calculating observed beamforming power of each group of the base elements, by applying a cross-correlation matrix to determine observed power signals and delay of each signal at each remote antenna element of the user equipment. Emulation includes supplying cross-correlated signals to remote antenna elements of user equipment during a RF test of the user equipment. Disclosed technology includes a channel emulator that generates output streams for testing user equipment for multiple users.

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