|[January 30, 2014]
Signals Research Group's New LTE Smartphone Benchmark Study Finds Wide Variations in Data Performance
SUNNYVALE, Calif. --(Business Wire)--
Communications, the leader in testing networks, services and
devices, announced today it has collaborated with Signals
Research Group (SRG) and ETS-Lindgren
on the first independent Over-the-Air (OTA) benchmark study of
commercial LTE (News - Alert) smartphone performance. Results of SRG's study illustrate
the unique ability of the OTA test methodology to detect clear data
performance differences between commercial LTE device implementations,
as well as confirming that poorly-performing smartphones make
inefficient use of network resources and can significantly degrade the
mobile user experience.
"Once a great-performing chipset is embedded into a mobile device, there
are innumerable factors that could result in the smartphone performing
poorly with respect to cellular connectivity, including implementation
of MIMO antennas," commented Michael Thelander, CEO of Signals Research
Group. "For this reason we decided to conduct this latest round of
benchmark testing over the air, as this is perhaps the best methodology
available today to fully characterize device performance."
Key conclusions of the study:
A poor-performing smartphone can dramatically degrade the user
experience, make inefficient use of valuable network resources and
increase subscriber churn.
Data throughput was generally substantially higher with MIMO than
without, but the benefits were far less meaningful with less favorable
Although far from conclusive, the study found that a protective cover
can have a modest impact on the performance of a smartphone, in
particular when using MIMO.
"Our study found substantial OTA cellular performance differences in the
smartphones tested," added Thelander. "However the results show that one
device - the Moto X from Motorola (News - Alert) Mobility - came out on top by a
The study included OTA tests for LTE data throughput performance with
MIMO for some of the industry's most popular mobile devices, all of
which used chipsets from a single manufacturer. Past SRG studies
utilized traditional lab-based coducted testing, which provide valuable
information on device and chipset performance, but do not deliver the
complete cellular performance picture that can be achieved with OTA
testing. OTA testing is carried out in a controlled radiated
environment, in this case a cost-effective anechoic chamber, exposing
the device under test to radiated signals from probes within the chamber
while isolating the device from external elements that could influence
the cellular performance results.
"OTA test methodology is the only way to thoroughly assess the
real-world data performance of LTE devices," said Bryan Sayler, Senior
Vice President ETS Lindgren. "Performance is highly dependent on device
design, especially with complex antenna schemes such as MIMO. As LTE
continues to roll out we believe that the industry will place much
greater reliance on testing mobile device performance over the air,
utilizing an approach similar to the one used in this important SRG
"We were thrilled to partner with SRG and ETS to showcase the value-add
of OTA test methodology when it comes to accurately evaluating and
ultimately improving the overall user experience," said Nigel Wright,
Vice President Spirent Communications (News - Alert). "In benchmarking commercial
devices that all used chipsets from a single vendor, we exposed the
reality that use of a top-performing chipset does not necessarily
guarantee a top-performing mobile device. The industry has a significant
and complex challenge to address when validating LTE device performance
to ensure a successful commercial rollout."
This study utilized Spirent's CS8
LTE Network Emulator, VR5
channel emulator, Spirent
DatumLab server and ETS Lindgren's new AMS-8055 MIMO Single Cluster
Environment Simulator as a cost-effective approach to conducting the OTA
tests.�All devices evaluated were commercially-available and procured
directly from the mobile operator's store or website. None of the
handset manufacturers included in the study had any prior knowledge of
the study or its results until after the report was published.
For a preview of the report in Signals Ahead, "Chips and Salsa XVII:
When Iconic Meets Anechoic" please visit the consultancy's website at www.signalsresearch.com.
About ETS-Lindgren (News - Alert)
ETS-Lindgren is an international manufacturer of components and systems
that measure, shield and control electromagnetic and acoustic energy.
The company's products are used for electromagnetic compatibility (EMC (News - Alert)),
microwave and wireless testing, electromagnetic field (EMF) measurement,
radio frequency (RF) personal safety monitoring, magnetic resonance
imaging (MRI) and control of acoustic environments.
Headquartered in Cedar Park, Texas, ETS-Lindgren has manufacturing
facilities in North America, Europe and Asia. The company is a wholly
owned subsidiary of ESCO Technologies, a leading supplier of engineered
products for growing industrial and commercial markets. ESCO is a New
York Stock Exchange listed company (symbol ESE) with headquarters in St.
Louis, Missouri. Additional information about ETS-Lindgren is available
Additional information about ESCO and its subsidiaries is available at www.escotechnologies.com.
About Spirent Communications plc
Spirent Communications plc. (LSE: SPT), a global leader in test and
measurement, offers an extensive portfolio of solutions to test data
centers, cloud computing and virtualized environments, high speed
Ethernet networks and services, 3G/4G wireless networks and devices,
network and application security, and positioning technologies. For more
information visit http://www.spirent.com/about-us/News_Room/About_Spirent_Communications_plc.aspx
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