Overview |
Main Features |
VQT Results and GPS Mapping
Hardware Configuration |
Wireless Call Control |
Buyers Guide
Overview
Voice Quality Testing for wireless networks is an increasingly important concern throughout the industry.
GL's Wireless VQT solution provides all the necessary equipment and functionality in order to fully manage voice quality
testing on wireless networks. Adding to its existing wireless test solution, GL introduces Wireless VQT Drive-Testing, which provides
the necessary portable equipment and functionality for a true mobile test. The GL Drive-Test solution includes the necessary
functionality to support call control for most mobile phone manufactures/models, the capability for sending/recording voice over the
mobile phone, the ability to analyze the voice and provide VQT measurement results along with VQT analysis results, and finally
the ability to associate the GPS location coordinates and GPS time stamping with each VQT measurement result. The results can
also be plotted using common GPS mapping software.
GL provides all these necessary capabilities in a portable, easy to use package. Hardware associated with the Drive-Testing
solution includes the GL’s UTA for each mobile phone, the GPS Receiver for plotting coordinates during the drive testing, and the
GL’s portable Wireless Drive-Testing Enclosure that allows easy transport of all hardware within a vehicle… just plug into the cigarette
lighter (for power) and start the test. With an added wireless network connection, the GL Wireless VQT solution, including all functionality,
can be remotely controlled and all results transmitted to remote locations. Load configurations and Start/Stop the tests, grab test results
and stream audio to the command center locations. GL's Wireless VQT solution is a must for anyone looking for a fully automated,
portable, and easy-to-use wireless test solution, one that is powerful enough to fully analyze the wireless network or mobile phones and
provide complete results.
The GL VQT utilizes three widely accepted algorithms to perform the voice comparisons, the Perceptual Evaluation of Speech
Quality (PESQ LQ/LQO) per Rec. P.862/P862.1, the Perceptual Analysis / Measurement System (PAMS) per Rec. P.800, and the
Perceptual Speech Quality Measurement (PSQM) per Rec. P.861. PESQ provides an objective measurement of subjective listening
tests on telephony systems. PAMS predicts overall subjective listening quality (a human's perception of quality) without requiring
actual subjective testing (a very expensive and time-consuming process). PSQM predicts subjective quality of speech codecs
without requiring subjective testing. The GL VQT performs PESQ, PAMS, and PSQM (+) simultaneously; using two voice files
(Reference File and Degraded File) and provides the algorithm results along with analytical results in both a graphical and tabular
format.
Additional Information:
Main Features
- Compact and portable solution that may reside in a vehicle (truly portable)
- Mobile Phone call control (currently available for most phone manufactures/models)
- Bluetooth® compatible for both Call Control as well as Audio Send/Record
- Synchronized software for sending/recording of voice files
- Automatic Round Trip Delay (RTD) measurements with complete results sent to GL VQT
- GPS Location includes stamping each VQT result with Latitude, Longitude, Altitude, and GPS Time Stamp
- GL VQT Automatic Mode allows automatic execution of the VQT algorithms (PESQ LQ/LQO, PAMS, PSQM+)
- Full-featured remote capability that permits loading configurations, starting/stopping tests, and retrieving test results.
- Log all results with GPS timestamping/coordinates and plot using off-the-shelf GPS mapping software
- Obtain network signal strength levels from wireless phone
VQT Results and GPS Mapping
As a result of the Drive Testing and subsequent VQT measurements, a log is created with all relevant information, including
GPS timestamp and coordinates. This logged information can be imported to most GPS mapping software applications for an
overall graphical understanding of the results.
Hardware Configuration
A single VQuad™, using a single laptop PC, can operate up to 4 wireless mobile phones (via data cable or Bluetooth®)
simultaneously. Call Control of the wireless phones, sending/recording voice through the wireless phone (via data cable or
Bluetooth®), performing signal strength test and round-trip delay measurements can all be controlled through the GL
VQuad™ application.
All hardware associated with the GL Wireless Drive Test is conveniently packaged in a custom enclosure that can be
transported within a vehicle; just plug into the cigarette lighter (for power), connect to the PC Laptop using the USB connections
and start the test. Up to four mobile phones can be supported simultaneously within a single enclosure, all conveniently controlled
from a single laptop running the GL VQuad™ software. Both the GL VQuad™ and GL VQT applications can be
remotely accessed via the Internet and the audio voice files may be streamed to the remote location.
Wireless Call Control
As an option to the GL VQuad™ software, the ability to automatically control the wireless phone (via data cable or Bluetooth®)
for placing calls, answering calls, disconnecting calls, and obtaining relevant information such as network signal strength is available
using the VQuad™ Call Control option.
Screen Shot of VQuad™ with Call Control
Screen Shot of Active Phone Status Window
Screen Shot of Script Editor Window
Buyer's Guide:
* Specifications are subject to change without notice.
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